/**!
 * Sortable 1.10.2
 * @author	RubaXa   <trash@rubaxa.org>
 * @author	owenm    <owen23355@gmail.com>
 * @license MIT
 */
;(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined'
    ? (module.exports = factory())
    : typeof define === 'function' && define.amd
    ? define(factory)
    : ((global = global || self), (global.Sortable = factory()))
})(this, function () {
  'use strict'

  function _typeof(obj) {
    if (typeof Symbol === 'function' && typeof Symbol.iterator === 'symbol') {
      _typeof = function (obj) {
        return typeof obj
      }
    } else {
      _typeof = function (obj) {
        return obj &&
          typeof Symbol === 'function' &&
          obj.constructor === Symbol &&
          obj !== Symbol.prototype
          ? 'symbol'
          : typeof obj
      }
    }

    return _typeof(obj)
  }

  function _defineProperty(obj, key, value) {
    if (key in obj) {
      Object.defineProperty(obj, key, {
        value: value,
        enumerable: true,
        configurable: true,
        writable: true,
      })
    } else {
      obj[key] = value
    }

    return obj
  }

  function _extends() {
    _extends =
      Object.assign ||
      function (target) {
        for (var i = 1; i < arguments.length; i++) {
          var source = arguments[i]

          for (var key in source) {
            if (Object.prototype.hasOwnProperty.call(source, key)) {
              target[key] = source[key]
            }
          }
        }

        return target
      }

    return _extends.apply(this, arguments)
  }

  function _objectSpread(target) {
    for (var i = 1; i < arguments.length; i++) {
      var source = arguments[i] != null ? arguments[i] : {}
      var ownKeys = Object.keys(source)

      if (typeof Object.getOwnPropertySymbols === 'function') {
        ownKeys = ownKeys.concat(
          Object.getOwnPropertySymbols(source).filter(function (sym) {
            return Object.getOwnPropertyDescriptor(source, sym).enumerable
          })
        )
      }

      ownKeys.forEach(function (key) {
        _defineProperty(target, key, source[key])
      })
    }

    return target
  }

  function _objectWithoutPropertiesLoose(source, excluded) {
    if (source == null) return {}
    var target = {}
    var sourceKeys = Object.keys(source)
    var key, i

    for (i = 0; i < sourceKeys.length; i++) {
      key = sourceKeys[i]
      if (excluded.indexOf(key) >= 0) continue
      target[key] = source[key]
    }

    return target
  }

  function _objectWithoutProperties(source, excluded) {
    if (source == null) return {}

    var target = _objectWithoutPropertiesLoose(source, excluded)

    var key, i

    if (Object.getOwnPropertySymbols) {
      var sourceSymbolKeys = Object.getOwnPropertySymbols(source)

      for (i = 0; i < sourceSymbolKeys.length; i++) {
        key = sourceSymbolKeys[i]
        if (excluded.indexOf(key) >= 0) continue
        if (!Object.prototype.propertyIsEnumerable.call(source, key)) continue
        target[key] = source[key]
      }
    }

    return target
  }

  function _toConsumableArray(arr) {
    return (
      _arrayWithoutHoles(arr) || _iterableToArray(arr) || _nonIterableSpread()
    )
  }

  function _arrayWithoutHoles(arr) {
    if (Array.isArray(arr)) {
      for (var i = 0, arr2 = new Array(arr.length); i < arr.length; i++)
        arr2[i] = arr[i]

      return arr2
    }
  }

  function _iterableToArray(iter) {
    if (
      Symbol.iterator in Object(iter) ||
      Object.prototype.toString.call(iter) === '[object Arguments]'
    )
      return Array.from(iter)
  }

  function _nonIterableSpread() {
    throw new TypeError('Invalid attempt to spread non-iterable instance')
  }

  var version = '1.10.2'

  function userAgent(pattern) {
    if (typeof window !== 'undefined' && window.navigator) {
      return !!(
        /*@__PURE__*/
        navigator.userAgent.match(pattern)
      )
    }
  }

  var IE11OrLess = userAgent(
    /(?:Trident.*rv[ :]?11\.|msie|iemobile|Windows Phone)/i
  )
  var Edge = userAgent(/Edge/i)
  var FireFox = userAgent(/firefox/i)
  var Safari =
    userAgent(/safari/i) && !userAgent(/chrome/i) && !userAgent(/android/i)
  var IOS = userAgent(/iP(ad|od|hone)/i)
  var ChromeForAndroid = userAgent(/chrome/i) && userAgent(/android/i)

  var captureMode = {
    capture: false,
    passive: false,
  }

  function on(el, event, fn) {
    el.addEventListener(event, fn, !IE11OrLess && captureMode)
  }

  function off(el, event, fn) {
    el.removeEventListener(event, fn, !IE11OrLess && captureMode)
  }

  function matches(
    /**HTMLElement*/
    el,
    /**String*/
    selector
  ) {
    if (!selector) return
    selector[0] === '>' && (selector = selector.substring(1))

    if (el) {
      try {
        if (el.matches) {
          return el.matches(selector)
        } else if (el.msMatchesSelector) {
          return el.msMatchesSelector(selector)
        } else if (el.webkitMatchesSelector) {
          return el.webkitMatchesSelector(selector)
        }
      } catch (_) {
        return false
      }
    }

    return false
  }

  function getParentOrHost(el) {
    return el.host && el !== document && el.host.nodeType
      ? el.host
      : el.parentNode
  }

  function closest(
    /**HTMLElement*/
    el,
    /**String*/
    selector,
    /**HTMLElement*/
    ctx,
    includeCTX
  ) {
    if (el) {
      ctx = ctx || document

      do {
        if (
          (selector != null &&
            (selector[0] === '>'
              ? el.parentNode === ctx && matches(el, selector)
              : matches(el, selector))) ||
          (includeCTX && el === ctx)
        ) {
          return el
        }

        if (el === ctx) break
        /* jshint boss:true */
      } while ((el = getParentOrHost(el)))
    }

    return null
  }

  var R_SPACE = /\s+/g

  function toggleClass(el, name, state) {
    if (el && name) {
      if (el.classList) {
        el.classList[state ? 'add' : 'remove'](name)
      } else {
        var className = (' ' + el.className + ' ')
          .replace(R_SPACE, ' ')
          .replace(' ' + name + ' ', ' ')
        el.className = (className + (state ? ' ' + name : '')).replace(
          R_SPACE,
          ' '
        )
      }
    }
  }

  function css(el, prop, val) {
    var style = el && el.style

    if (style) {
      if (val === void 0) {
        if (document.defaultView && document.defaultView.getComputedStyle) {
          val = document.defaultView.getComputedStyle(el, '')
        } else if (el.currentStyle) {
          val = el.currentStyle
        }

        return prop === void 0 ? val : val[prop]
      } else {
        if (!(prop in style) && prop.indexOf('webkit') === -1) {
          prop = '-webkit-' + prop
        }

        style[prop] = val + (typeof val === 'string' ? '' : 'px')
      }
    }
  }

  function matrix(el, selfOnly) {
    var appliedTransforms = ''

    if (typeof el === 'string') {
      appliedTransforms = el
    } else {
      do {
        var transform = css(el, 'transform')

        if (transform && transform !== 'none') {
          appliedTransforms = transform + ' ' + appliedTransforms
        }
        /* jshint boss:true */
      } while (!selfOnly && (el = el.parentNode))
    }

    var matrixFn =
      window.DOMMatrix ||
      window.WebKitCSSMatrix ||
      window.CSSMatrix ||
      window.MSCSSMatrix
    /*jshint -W056 */

    return matrixFn && new matrixFn(appliedTransforms)
  }

  function find(ctx, tagName, iterator) {
    if (ctx) {
      var list = ctx.getElementsByTagName(tagName),
        i = 0,
        n = list.length

      if (iterator) {
        for (; i < n; i++) {
          iterator(list[i], i)
        }
      }

      return list
    }

    return []
  }

  function getWindowScrollingElement() {
    var scrollingElement = document.scrollingElement

    if (scrollingElement) {
      return scrollingElement
    } else {
      return document.documentElement
    }
  }
  /**
   * Returns the "bounding client rect" of given element
   * @param  {HTMLElement} el                       The element whose boundingClientRect is wanted
   * @param  {[Boolean]} relativeToContainingBlock  Whether the rect should be relative to the containing block of (including) the container
   * @param  {[Boolean]} relativeToNonStaticParent  Whether the rect should be relative to the relative parent of (including) the contaienr
   * @param  {[Boolean]} undoScale                  Whether the container's scale() should be undone
   * @param  {[HTMLElement]} container              The parent the element will be placed in
   * @return {Object}                               The boundingClientRect of el, with specified adjustments
   */

  function getRect(
    el,
    relativeToContainingBlock,
    relativeToNonStaticParent,
    undoScale,
    container
  ) {
    if (!el.getBoundingClientRect && el !== window) return
    var elRect, top, left, bottom, right, height, width

    if (el !== window && el !== getWindowScrollingElement()) {
      elRect = el.getBoundingClientRect()
      top = elRect.top
      left = elRect.left
      bottom = elRect.bottom
      right = elRect.right
      height = elRect.height
      width = elRect.width
    } else {
      top = 0
      left = 0
      bottom = window.innerHeight
      right = window.innerWidth
      height = window.innerHeight
      width = window.innerWidth
    }

    if (
      (relativeToContainingBlock || relativeToNonStaticParent) &&
      el !== window
    ) {
      // Adjust for translate()
      container = container || el.parentNode // solves #1123 (see: https://stackoverflow.com/a/37953806/6088312)
      // Not needed on <= IE11

      if (!IE11OrLess) {
        do {
          if (
            container &&
            container.getBoundingClientRect &&
            (css(container, 'transform') !== 'none' ||
              (relativeToNonStaticParent &&
                css(container, 'position') !== 'static'))
          ) {
            var containerRect = container.getBoundingClientRect() // Set relative to edges of padding box of container

            top -=
              containerRect.top + parseInt(css(container, 'border-top-width'))
            left -=
              containerRect.left + parseInt(css(container, 'border-left-width'))
            bottom = top + elRect.height
            right = left + elRect.width
            break
          }
          /* jshint boss:true */
        } while ((container = container.parentNode))
      }
    }

    if (undoScale && el !== window) {
      // Adjust for scale()
      var elMatrix = matrix(container || el),
        scaleX = elMatrix && elMatrix.a,
        scaleY = elMatrix && elMatrix.d

      if (elMatrix) {
        top /= scaleY
        left /= scaleX
        width /= scaleX
        height /= scaleY
        bottom = top + height
        right = left + width
      }
    }

    return {
      top: top,
      left: left,
      bottom: bottom,
      right: right,
      width: width,
      height: height,
    }
  }
  /**
   * Checks if a side of an element is scrolled past a side of its parents
   * @param  {HTMLElement}  el           The element who's side being scrolled out of view is in question
   * @param  {String}       elSide       Side of the element in question ('top', 'left', 'right', 'bottom')
   * @param  {String}       parentSide   Side of the parent in question ('top', 'left', 'right', 'bottom')
   * @return {HTMLElement}               The parent scroll element that the el's side is scrolled past, or null if there is no such element
   */

  function isScrolledPast(el, elSide, parentSide) {
    var parent = getParentAutoScrollElement(el, true),
      elSideVal = getRect(el)[elSide]
    /* jshint boss:true */

    while (parent) {
      var parentSideVal = getRect(parent)[parentSide],
        visible = void 0

      if (parentSide === 'top' || parentSide === 'left') {
        visible = elSideVal >= parentSideVal
      } else {
        visible = elSideVal <= parentSideVal
      }

      if (!visible) return parent
      if (parent === getWindowScrollingElement()) break
      parent = getParentAutoScrollElement(parent, false)
    }

    return false
  }
  /**
   * Gets nth child of el, ignoring hidden children, sortable's elements (does not ignore clone if it's visible)
   * and non-draggable elements
   * @param  {HTMLElement} el       The parent element
   * @param  {Number} childNum      The index of the child
   * @param  {Object} options       Parent Sortable's options
   * @return {HTMLElement}          The child at index childNum, or null if not found
   */

  function getChild(el, childNum, options) {
    var currentChild = 0,
      i = 0,
      children = el.children

    while (i < children.length) {
      if (
        children[i].style.display !== 'none' &&
        children[i] !== Sortable.ghost &&
        children[i] !== Sortable.dragged &&
        closest(children[i], options.draggable, el, false)
      ) {
        if (currentChild === childNum) {
          return children[i]
        }

        currentChild++
      }

      i++
    }

    return null
  }
  /**
   * Gets the last child in the el, ignoring ghostEl or invisible elements (clones)
   * @param  {HTMLElement} el       Parent element
   * @param  {selector} selector    Any other elements that should be ignored
   * @return {HTMLElement}          The last child, ignoring ghostEl
   */

  function lastChild(el, selector) {
    var last = el.lastElementChild

    while (
      last &&
      (last === Sortable.ghost ||
        css(last, 'display') === 'none' ||
        (selector && !matches(last, selector)))
    ) {
      last = last.previousElementSibling
    }

    return last || null
  }
  /**
   * Returns the index of an element within its parent for a selected set of
   * elements
   * @param  {HTMLElement} el
   * @param  {selector} selector
   * @return {number}
   */

  function index(el, selector) {
    var index = 0

    if (!el || !el.parentNode) {
      return -1
    }
    /* jshint boss:true */

    while ((el = el.previousElementSibling)) {
      if (
        el.nodeName.toUpperCase() !== 'TEMPLATE' &&
        el !== Sortable.clone &&
        (!selector || matches(el, selector))
      ) {
        index++
      }
    }

    return index
  }
  /**
   * Returns the scroll offset of the given element, added with all the scroll offsets of parent elements.
   * The value is returned in real pixels.
   * @param  {HTMLElement} el
   * @return {Array}             Offsets in the format of [left, top]
   */

  function getRelativeScrollOffset(el) {
    var offsetLeft = 0,
      offsetTop = 0,
      winScroller = getWindowScrollingElement()

    if (el) {
      do {
        var elMatrix = matrix(el),
          scaleX = elMatrix.a,
          scaleY = elMatrix.d
        offsetLeft += el.scrollLeft * scaleX
        offsetTop += el.scrollTop * scaleY
      } while (el !== winScroller && (el = el.parentNode))
    }

    return [offsetLeft, offsetTop]
  }
  /**
   * Returns the index of the object within the given array
   * @param  {Array} arr   Array that may or may not hold the object
   * @param  {Object} obj  An object that has a key-value pair unique to and identical to a key-value pair in the object you want to find
   * @return {Number}      The index of the object in the array, or -1
   */

  function indexOfObject(arr, obj) {
    for (var i in arr) {
      if (!arr.hasOwnProperty(i)) continue

      for (var key in obj) {
        if (obj.hasOwnProperty(key) && obj[key] === arr[i][key])
          return Number(i)
      }
    }

    return -1
  }

  function getParentAutoScrollElement(el, includeSelf) {
    // skip to window
    if (!el || !el.getBoundingClientRect) return getWindowScrollingElement()
    var elem = el
    var gotSelf = false

    do {
      // we don't need to get elem css if it isn't even overflowing in the first place (performance)
      if (
        elem.clientWidth < elem.scrollWidth ||
        elem.clientHeight < elem.scrollHeight
      ) {
        var elemCSS = css(elem)

        if (
          (elem.clientWidth < elem.scrollWidth &&
            (elemCSS.overflowX == 'auto' || elemCSS.overflowX == 'scroll')) ||
          (elem.clientHeight < elem.scrollHeight &&
            (elemCSS.overflowY == 'auto' || elemCSS.overflowY == 'scroll'))
        ) {
          if (!elem.getBoundingClientRect || elem === document.body)
            return getWindowScrollingElement()
          if (gotSelf || includeSelf) return elem
          gotSelf = true
        }
      }
      /* jshint boss:true */
    } while ((elem = elem.parentNode))

    return getWindowScrollingElement()
  }

  function extend(dst, src) {
    if (dst && src) {
      for (var key in src) {
        if (src.hasOwnProperty(key)) {
          dst[key] = src[key]
        }
      }
    }

    return dst
  }

  function isRectEqual(rect1, rect2) {
    return (
      Math.round(rect1.top) === Math.round(rect2.top) &&
      Math.round(rect1.left) === Math.round(rect2.left) &&
      Math.round(rect1.height) === Math.round(rect2.height) &&
      Math.round(rect1.width) === Math.round(rect2.width)
    )
  }

  var _throttleTimeout

  function throttle(callback, ms) {
    return function () {
      if (!_throttleTimeout) {
        var args = arguments,
          _this = this

        if (args.length === 1) {
          callback.call(_this, args[0])
        } else {
          callback.apply(_this, args)
        }

        _throttleTimeout = setTimeout(function () {
          _throttleTimeout = void 0
        }, ms)
      }
    }
  }

  function cancelThrottle() {
    clearTimeout(_throttleTimeout)
    _throttleTimeout = void 0
  }

  function scrollBy(el, x, y) {
    el.scrollLeft += x
    el.scrollTop += y
  }

  function clone(el) {
    var Polymer = window.Polymer
    var $ = window.jQuery || window.Zepto

    if (Polymer && Polymer.dom) {
      return Polymer.dom(el).cloneNode(true)
    }
    // ------------------------------------------------
    //  else if ($) {
    //   return $(el).clone(true)[0];
    // }
    else {
      return el.cloneNode(true)
    }
  }

  function setRect(el, rect) {
    css(el, 'position', 'absolute')
    css(el, 'top', rect.top)
    css(el, 'left', rect.left)
    css(el, 'width', rect.width)
    css(el, 'height', rect.height)
  }

  function unsetRect(el) {
    css(el, 'position', '')
    css(el, 'top', '')
    css(el, 'left', '')
    css(el, 'width', '')
    css(el, 'height', '')
  }

  var expando = 'Sortable' + new Date().getTime()

  function AnimationStateManager() {
    var animationStates = [],
      animationCallbackId
    return {
      captureAnimationState: function captureAnimationState() {
        animationStates = []
        if (!this.options.animation) return
        var children = [].slice.call(this.el.children)
        children.forEach(function (child) {
          if (css(child, 'display') === 'none' || child === Sortable.ghost)
            return
          animationStates.push({
            target: child,
            rect: getRect(child),
          })

          var fromRect = _objectSpread(
            {},
            animationStates[animationStates.length - 1].rect
          ) // If animating: compensate for current animation

          if (child.thisAnimationDuration) {
            var childMatrix = matrix(child, true)

            if (childMatrix) {
              fromRect.top -= childMatrix.f
              fromRect.left -= childMatrix.e
            }
          }

          child.fromRect = fromRect
        })
      },
      addAnimationState: function addAnimationState(state) {
        animationStates.push(state)
      },
      removeAnimationState: function removeAnimationState(target) {
        animationStates.splice(
          indexOfObject(animationStates, {
            target: target,
          }),
          1
        )
      },
      animateAll: function animateAll(callback) {
        var _this = this

        if (!this.options.animation) {
          clearTimeout(animationCallbackId)
          if (typeof callback === 'function') callback()
          return
        }

        var animating = false,
          animationTime = 0
        animationStates.forEach(function (state) {
          var time = 0,
            target = state.target,
            fromRect = target.fromRect,
            toRect = getRect(target),
            prevFromRect = target.prevFromRect,
            prevToRect = target.prevToRect,
            animatingRect = state.rect,
            targetMatrix = matrix(target, true)

          if (targetMatrix) {
            // Compensate for current animation
            toRect.top -= targetMatrix.f
            toRect.left -= targetMatrix.e
          }

          target.toRect = toRect

          if (target.thisAnimationDuration) {
            // Could also check if animatingRect is between fromRect and toRect
            if (
              isRectEqual(prevFromRect, toRect) &&
              !isRectEqual(fromRect, toRect) && // Make sure animatingRect is on line between toRect & fromRect
              (animatingRect.top - toRect.top) /
                (animatingRect.left - toRect.left) ===
                (fromRect.top - toRect.top) / (fromRect.left - toRect.left)
            ) {
              // If returning to same place as started from animation and on same axis
              time = calculateRealTime(
                animatingRect,
                prevFromRect,
                prevToRect,
                _this.options
              )
            }
          } // if fromRect != toRect: animate

          if (!isRectEqual(toRect, fromRect)) {
            target.prevFromRect = fromRect
            target.prevToRect = toRect

            if (!time) {
              time = _this.options.animation
            }

            _this.animate(target, animatingRect, toRect, time)
          }

          if (time) {
            animating = true
            animationTime = Math.max(animationTime, time)
            clearTimeout(target.animationResetTimer)
            target.animationResetTimer = setTimeout(function () {
              target.animationTime = 0
              target.prevFromRect = null
              target.fromRect = null
              target.prevToRect = null
              target.thisAnimationDuration = null
            }, time)
            target.thisAnimationDuration = time
          }
        })
        clearTimeout(animationCallbackId)

        if (!animating) {
          if (typeof callback === 'function') callback()
        } else {
          animationCallbackId = setTimeout(function () {
            if (typeof callback === 'function') callback()
          }, animationTime)
        }

        animationStates = []
      },
      animate: function animate(target, currentRect, toRect, duration) {
        if (duration) {
          css(target, 'transition', '')
          css(target, 'transform', '')
          var elMatrix = matrix(this.el),
            scaleX = elMatrix && elMatrix.a,
            scaleY = elMatrix && elMatrix.d,
            translateX = (currentRect.left - toRect.left) / (scaleX || 1),
            translateY = (currentRect.top - toRect.top) / (scaleY || 1)
          target.animatingX = !!translateX
          target.animatingY = !!translateY
          css(
            target,
            'transform',
            'translate3d(' + translateX + 'px,' + translateY + 'px,0)'
          )
          repaint(target) // repaint

          css(
            target,
            'transition',
            'transform ' +
              duration +
              'ms' +
              (this.options.easing ? ' ' + this.options.easing : '')
          )
          css(target, 'transform', 'translate3d(0,0,0)')
          typeof target.animated === 'number' && clearTimeout(target.animated)
          target.animated = setTimeout(function () {
            css(target, 'transition', '')
            css(target, 'transform', '')
            target.animated = false
            target.animatingX = false
            target.animatingY = false
          }, duration)
        }
      },
    }
  }

  function repaint(target) {
    return target.offsetWidth
  }

  function calculateRealTime(animatingRect, fromRect, toRect, options) {
    return (
      (Math.sqrt(
        Math.pow(fromRect.top - animatingRect.top, 2) +
          Math.pow(fromRect.left - animatingRect.left, 2)
      ) /
        Math.sqrt(
          Math.pow(fromRect.top - toRect.top, 2) +
            Math.pow(fromRect.left - toRect.left, 2)
        )) *
      options.animation
    )
  }

  var plugins = []
  var defaults = {
    initializeByDefault: true,
  }
  var PluginManager = {
    mount: function mount(plugin) {
      // Set default static properties
      for (var option in defaults) {
        if (defaults.hasOwnProperty(option) && !(option in plugin)) {
          plugin[option] = defaults[option]
        }
      }

      plugins.push(plugin)
    },
    pluginEvent: function pluginEvent(eventName, sortable, evt) {
      var _this = this

      this.eventCanceled = false

      evt.cancel = function () {
        _this.eventCanceled = true
      }

      var eventNameGlobal = eventName + 'Global'
      plugins.forEach(function (plugin) {
        if (!sortable[plugin.pluginName]) return // Fire global events if it exists in this sortable

        if (sortable[plugin.pluginName][eventNameGlobal]) {
          sortable[plugin.pluginName][eventNameGlobal](
            _objectSpread(
              {
                sortable: sortable,
              },
              evt
            )
          )
        } // Only fire plugin event if plugin is enabled in this sortable,
        // and plugin has event defined

        if (
          sortable.options[plugin.pluginName] &&
          sortable[plugin.pluginName][eventName]
        ) {
          sortable[plugin.pluginName][eventName](
            _objectSpread(
              {
                sortable: sortable,
              },
              evt
            )
          )
        }
      })
    },
    initializePlugins: function initializePlugins(
      sortable,
      el,
      defaults,
      options
    ) {
      plugins.forEach(function (plugin) {
        var pluginName = plugin.pluginName
        if (!sortable.options[pluginName] && !plugin.initializeByDefault) return
        var initialized = new plugin(sortable, el, sortable.options)
        initialized.sortable = sortable
        initialized.options = sortable.options
        sortable[pluginName] = initialized // Add default options from plugin

        _extends(defaults, initialized.defaults)
      })

      for (var option in sortable.options) {
        if (!sortable.options.hasOwnProperty(option)) continue
        var modified = this.modifyOption(
          sortable,
          option,
          sortable.options[option]
        )

        if (typeof modified !== 'undefined') {
          sortable.options[option] = modified
        }
      }
    },
    getEventProperties: function getEventProperties(name, sortable) {
      var eventProperties = {}
      plugins.forEach(function (plugin) {
        if (typeof plugin.eventProperties !== 'function') return

        _extends(
          eventProperties,
          plugin.eventProperties.call(sortable[plugin.pluginName], name)
        )
      })
      return eventProperties
    },
    modifyOption: function modifyOption(sortable, name, value) {
      var modifiedValue
      plugins.forEach(function (plugin) {
        // Plugin must exist on the Sortable
        if (!sortable[plugin.pluginName]) return // If static option listener exists for this option, call in the context of the Sortable's instance of this plugin

        if (
          plugin.optionListeners &&
          typeof plugin.optionListeners[name] === 'function'
        ) {
          modifiedValue = plugin.optionListeners[name].call(
            sortable[plugin.pluginName],
            value
          )
        }
      })
      return modifiedValue
    },
  }

  function dispatchEvent(_ref) {
    var sortable = _ref.sortable,
      rootEl = _ref.rootEl,
      name = _ref.name,
      targetEl = _ref.targetEl,
      cloneEl = _ref.cloneEl,
      toEl = _ref.toEl,
      fromEl = _ref.fromEl,
      oldIndex = _ref.oldIndex,
      newIndex = _ref.newIndex,
      oldDraggableIndex = _ref.oldDraggableIndex,
      newDraggableIndex = _ref.newDraggableIndex,
      originalEvent = _ref.originalEvent,
      putSortable = _ref.putSortable,
      extraEventProperties = _ref.extraEventProperties
    sortable = sortable || (rootEl && rootEl[expando])
    if (!sortable) return
    var evt,
      options = sortable.options,
      onName = 'on' + name.charAt(0).toUpperCase() + name.substr(1) // Support for new CustomEvent feature

    if (window.CustomEvent && !IE11OrLess && !Edge) {
      evt = new CustomEvent(name, {
        bubbles: true,
        cancelable: true,
      })
    } else {
      evt = document.createEvent('Event')
      evt.initEvent(name, true, true)
    }

    evt.to = toEl || rootEl
    evt.from = fromEl || rootEl
    evt.item = targetEl || rootEl
    evt.clone = cloneEl
    evt.oldIndex = oldIndex
    evt.newIndex = newIndex
    evt.oldDraggableIndex = oldDraggableIndex
    evt.newDraggableIndex = newDraggableIndex
    evt.originalEvent = originalEvent
    evt.pullMode = putSortable ? putSortable.lastPutMode : undefined

    var allEventProperties = _objectSpread(
      {},
      extraEventProperties,
      PluginManager.getEventProperties(name, sortable)
    )

    for (var option in allEventProperties) {
      evt[option] = allEventProperties[option]
    }

    if (rootEl) {
      rootEl.dispatchEvent(evt)
    }

    if (options[onName]) {
      options[onName].call(sortable, evt)
    }
  }

  var pluginEvent = function pluginEvent(eventName, sortable) {
    var _ref =
        arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {},
      originalEvent = _ref.evt,
      data = _objectWithoutProperties(_ref, ['evt'])

    PluginManager.pluginEvent.bind(Sortable)(
      eventName,
      sortable,
      _objectSpread(
        {
          dragEl: dragEl,
          parentEl: parentEl,
          ghostEl: ghostEl,
          rootEl: rootEl,
          nextEl: nextEl,
          lastDownEl: lastDownEl,
          cloneEl: cloneEl,
          cloneHidden: cloneHidden,
          dragStarted: moved,
          putSortable: putSortable,
          activeSortable: Sortable.active,
          originalEvent: originalEvent,
          oldIndex: oldIndex,
          oldDraggableIndex: oldDraggableIndex,
          newIndex: newIndex,
          newDraggableIndex: newDraggableIndex,
          hideGhostForTarget: _hideGhostForTarget,
          unhideGhostForTarget: _unhideGhostForTarget,
          cloneNowHidden: function cloneNowHidden() {
            cloneHidden = true
          },
          cloneNowShown: function cloneNowShown() {
            cloneHidden = false
          },
          dispatchSortableEvent: function dispatchSortableEvent(name) {
            _dispatchEvent({
              sortable: sortable,
              name: name,
              originalEvent: originalEvent,
            })
          },
        },
        data
      )
    )
  }

  function _dispatchEvent(info) {
    dispatchEvent(
      _objectSpread(
        {
          putSortable: putSortable,
          cloneEl: cloneEl,
          targetEl: dragEl,
          rootEl: rootEl,
          oldIndex: oldIndex,
          oldDraggableIndex: oldDraggableIndex,
          newIndex: newIndex,
          newDraggableIndex: newDraggableIndex,
        },
        info
      )
    )
  }

  var dragEl,
    parentEl,
    ghostEl,
    rootEl,
    nextEl,
    lastDownEl,
    cloneEl,
    cloneHidden,
    oldIndex,
    newIndex,
    oldDraggableIndex,
    newDraggableIndex,
    activeGroup,
    putSortable,
    awaitingDragStarted = false,
    ignoreNextClick = false,
    sortables = [],
    tapEvt,
    touchEvt,
    lastDx,
    lastDy,
    tapDistanceLeft,
    tapDistanceTop,
    moved,
    lastTarget,
    lastDirection,
    pastFirstInvertThresh = false,
    isCircumstantialInvert = false,
    targetMoveDistance,
    // For positioning ghost absolutely
    ghostRelativeParent,
    ghostRelativeParentInitialScroll = [],
    // (left, top)
    _silent = false,
    savedInputChecked = []
  /** @const */

  var documentExists = typeof document !== 'undefined',
    PositionGhostAbsolutely = IOS,
    CSSFloatProperty = Edge || IE11OrLess ? 'cssFloat' : 'float',
    // This will not pass for IE9, because IE9 DnD only works on anchors
    supportDraggable =
      documentExists &&
      !ChromeForAndroid &&
      !IOS &&
      'draggable' in document.createElement('div'),
    supportCssPointerEvents = (function () {
      if (!documentExists) return // false when <= IE11

      if (IE11OrLess) {
        return false
      }

      var el = document.createElement('x')
      el.style.cssText = 'pointer-events:auto'
      return el.style.pointerEvents === 'auto'
    })(),
    _detectDirection = function _detectDirection(el, options) {
      var elCSS = css(el),
        elWidth =
          parseInt(elCSS.width) -
          parseInt(elCSS.paddingLeft) -
          parseInt(elCSS.paddingRight) -
          parseInt(elCSS.borderLeftWidth) -
          parseInt(elCSS.borderRightWidth),
        child1 = getChild(el, 0, options),
        child2 = getChild(el, 1, options),
        firstChildCSS = child1 && css(child1),
        secondChildCSS = child2 && css(child2),
        firstChildWidth =
          firstChildCSS &&
          parseInt(firstChildCSS.marginLeft) +
            parseInt(firstChildCSS.marginRight) +
            getRect(child1).width,
        secondChildWidth =
          secondChildCSS &&
          parseInt(secondChildCSS.marginLeft) +
            parseInt(secondChildCSS.marginRight) +
            getRect(child2).width

      if (elCSS.display === 'flex') {
        return elCSS.flexDirection === 'column' ||
          elCSS.flexDirection === 'column-reverse'
          ? 'vertical'
          : 'horizontal'
      }

      if (elCSS.display === 'grid') {
        return elCSS.gridTemplateColumns.split(' ').length <= 1
          ? 'vertical'
          : 'horizontal'
      }

      if (
        child1 &&
        firstChildCSS['float'] &&
        firstChildCSS['float'] !== 'none'
      ) {
        var touchingSideChild2 =
          firstChildCSS['float'] === 'left' ? 'left' : 'right'
        return child2 &&
          (secondChildCSS.clear === 'both' ||
            secondChildCSS.clear === touchingSideChild2)
          ? 'vertical'
          : 'horizontal'
      }

      return child1 &&
        (firstChildCSS.display === 'block' ||
          firstChildCSS.display === 'flex' ||
          firstChildCSS.display === 'table' ||
          firstChildCSS.display === 'grid' ||
          (firstChildWidth >= elWidth && elCSS[CSSFloatProperty] === 'none') ||
          (child2 &&
            elCSS[CSSFloatProperty] === 'none' &&
            firstChildWidth + secondChildWidth > elWidth))
        ? 'vertical'
        : 'horizontal'
    },
    _dragElInRowColumn = function _dragElInRowColumn(
      dragRect,
      targetRect,
      vertical
    ) {
      var dragElS1Opp = vertical ? dragRect.left : dragRect.top,
        dragElS2Opp = vertical ? dragRect.right : dragRect.bottom,
        dragElOppLength = vertical ? dragRect.width : dragRect.height,
        targetS1Opp = vertical ? targetRect.left : targetRect.top,
        targetS2Opp = vertical ? targetRect.right : targetRect.bottom,
        targetOppLength = vertical ? targetRect.width : targetRect.height
      return (
        dragElS1Opp === targetS1Opp ||
        dragElS2Opp === targetS2Opp ||
        dragElS1Opp + dragElOppLength / 2 === targetS1Opp + targetOppLength / 2
      )
    },
    /**
     * Detects first nearest empty sortable to X and Y position using emptyInsertThreshold.
     * @param  {Number} x      X position
     * @param  {Number} y      Y position
     * @return {HTMLElement}   Element of the first found nearest Sortable
     */
    _detectNearestEmptySortable = function _detectNearestEmptySortable(x, y) {
      var ret
      sortables.some(function (sortable) {
        if (lastChild(sortable)) return
        var rect = getRect(sortable),
          threshold = sortable[expando].options.emptyInsertThreshold,
          insideHorizontally =
            x >= rect.left - threshold && x <= rect.right + threshold,
          insideVertically =
            y >= rect.top - threshold && y <= rect.bottom + threshold

        if (threshold && insideHorizontally && insideVertically) {
          return (ret = sortable)
        }
      })
      return ret
    },
    _prepareGroup = function _prepareGroup(options) {
      function toFn(value, pull) {
        return function (to, from, dragEl, evt) {
          var sameGroup =
            to.options.group.name &&
            from.options.group.name &&
            to.options.group.name === from.options.group.name

          if (value == null && (pull || sameGroup)) {
            // Default pull value
            // Default pull and put value if same group
            return true
          } else if (value == null || value === false) {
            return false
          } else if (pull && value === 'clone') {
            return value
          } else if (typeof value === 'function') {
            return toFn(value(to, from, dragEl, evt), pull)(
              to,
              from,
              dragEl,
              evt
            )
          } else {
            var otherGroup = (pull ? to : from).options.group.name
            return (
              value === true ||
              (typeof value === 'string' && value === otherGroup) ||
              (value.join && value.indexOf(otherGroup) > -1)
            )
          }
        }
      }

      var group = {}
      var originalGroup = options.group

      if (!originalGroup || _typeof(originalGroup) != 'object') {
        originalGroup = {
          name: originalGroup,
        }
      }

      group.name = originalGroup.name
      group.checkPull = toFn(originalGroup.pull, true)
      group.checkPut = toFn(originalGroup.put)
      group.revertClone = originalGroup.revertClone
      options.group = group
    },
    _hideGhostForTarget = function _hideGhostForTarget() {
      if (!supportCssPointerEvents && ghostEl) {
        css(ghostEl, 'display', 'none')
      }
    },
    _unhideGhostForTarget = function _unhideGhostForTarget() {
      if (!supportCssPointerEvents && ghostEl) {
        css(ghostEl, 'display', '')
      }
    } // #1184 fix - Prevent click event on fallback if dragged but item not changed position

  if (documentExists) {
    document.addEventListener(
      'click',
      function (evt) {
        if (ignoreNextClick) {
          evt.preventDefault()
          evt.stopPropagation && evt.stopPropagation()
          evt.stopImmediatePropagation && evt.stopImmediatePropagation()
          ignoreNextClick = false
          return false
        }
      },
      true
    )
  }

  var nearestEmptyInsertDetectEvent = function nearestEmptyInsertDetectEvent(
    evt
  ) {
    if (dragEl) {
      evt = evt.touches ? evt.touches[0] : evt

      var nearest = _detectNearestEmptySortable(evt.clientX, evt.clientY)

      if (nearest) {
        // Create imitation event
        var event = {}

        for (var i in evt) {
          if (evt.hasOwnProperty(i)) {
            event[i] = evt[i]
          }
        }

        event.target = event.rootEl = nearest
        event.preventDefault = void 0
        event.stopPropagation = void 0

        nearest[expando]._onDragOver(event)
      }
    }
  }

  var _checkOutsideTargetEl = function _checkOutsideTargetEl(evt) {
    if (dragEl) {
      dragEl.parentNode[expando]._isOutsideThisEl(evt.target)
    }
  }
  /**
   * @class  Sortable
   * @param  {HTMLElement}  el
   * @param  {Object}       [options]
   */

  function Sortable(el, options) {
    if (!(el && el.nodeType && el.nodeType === 1)) {
      throw 'Sortable: `el` must be an HTMLElement, not '.concat(
        {}.toString.call(el)
      )
    }

    this.el = el // root element

    this.options = options = _extends({}, options) // Export instance

    el[expando] = this
    var defaults = {
      group: null,
      sort: true,
      disabled: false,
      store: null,
      handle: null,
      draggable: /^[uo]l$/i.test(el.nodeName) ? '>li' : '>*',
      swapThreshold: 1,
      // percentage; 0 <= x <= 1
      invertSwap: false,
      // invert always
      invertedSwapThreshold: null,
      // will be set to same as swapThreshold if default
      removeCloneOnHide: true,
      direction: function direction() {
        return _detectDirection(el, this.options)
      },
      ghostClass: 'sortable-ghost',
      chosenClass: 'sortable-chosen',
      dragClass: 'sortable-drag',
      ignore: 'a, img',
      filter: null,
      preventOnFilter: true,
      animation: 0,
      easing: null,
      setData: function setData(dataTransfer, dragEl) {
        dataTransfer.setData('Text', dragEl.textContent)
      },
      dropBubble: false,
      dragoverBubble: false,
      dataIdAttr: 'data-id',
      delay: 0,
      delayOnTouchOnly: false,
      touchStartThreshold:
        (Number.parseInt ? Number : window).parseInt(
          window.devicePixelRatio,
          10
        ) || 1,
      forceFallback: false,
      fallbackClass: 'sortable-fallback',
      fallbackOnBody: false,
      fallbackTolerance: 0,
      fallbackOffset: {
        x: 0,
        y: 0,
      },
      supportPointer:
        Sortable.supportPointer !== false && 'PointerEvent' in window,
      emptyInsertThreshold: 5,
    }
    PluginManager.initializePlugins(this, el, defaults) // Set default options

    for (var name in defaults) {
      !(name in options) && (options[name] = defaults[name])
    }

    _prepareGroup(options) // Bind all private methods

    for (var fn in this) {
      if (fn.charAt(0) === '_' && typeof this[fn] === 'function') {
        this[fn] = this[fn].bind(this)
      }
    } // Setup drag mode

    this.nativeDraggable = options.forceFallback ? false : supportDraggable

    if (this.nativeDraggable) {
      // Touch start threshold cannot be greater than the native dragstart threshold
      this.options.touchStartThreshold = 1
    } // Bind events

    if (options.supportPointer) {
      on(el, 'pointerdown', this._onTapStart)
    } else {
      on(el, 'mousedown', this._onTapStart)
      on(el, 'touchstart', this._onTapStart)
    }

    if (this.nativeDraggable) {
      on(el, 'dragover', this)
      on(el, 'dragenter', this)
    }

    sortables.push(this.el) // Restore sorting

    options.store &&
      options.store.get &&
      this.sort(options.store.get(this) || []) // Add animation state manager

    _extends(this, AnimationStateManager())
  }

  Sortable.prototype =
    /** @lends Sortable.prototype */
    {
      constructor: Sortable,
      _isOutsideThisEl: function _isOutsideThisEl(target) {
        if (!this.el.contains(target) && target !== this.el) {
          lastTarget = null
        }
      },
      _getDirection: function _getDirection(evt, target) {
        return typeof this.options.direction === 'function'
          ? this.options.direction.call(this, evt, target, dragEl)
          : this.options.direction
      },
      _onTapStart: function _onTapStart(
        /** Event|TouchEvent */
        evt
      ) {
        if (!evt.cancelable) return

        var _this = this,
          el = this.el,
          options = this.options,
          preventOnFilter = options.preventOnFilter,
          type = evt.type,
          touch =
            (evt.touches && evt.touches[0]) ||
            (evt.pointerType && evt.pointerType === 'touch' && evt),
          target = (touch || evt).target,
          originalTarget =
            (evt.target.shadowRoot &&
              ((evt.path && evt.path[0]) ||
                (evt.composedPath && evt.composedPath()[0]))) ||
            target,
          filter = options.filter

        _saveInputCheckedState(el) // Don't trigger start event when an element is been dragged, otherwise the evt.oldindex always wrong when set option.group.

        if (dragEl) {
          return
        }

        if (
          (/mousedown|pointerdown/.test(type) && evt.button !== 0) ||
          options.disabled
        ) {
          return // only left button and enabled
        } // cancel dnd if original target is content editable

        if (originalTarget.isContentEditable) {
          return
        }

        target = closest(target, options.draggable, el, false)

        if (target && target.animated) {
          return
        }

        if (lastDownEl === target) {
          // Ignoring duplicate `down`
          return
        } // Get the index of the dragged element within its parent

        oldIndex = index(target)
        oldDraggableIndex = index(target, options.draggable) // Check filter

        if (typeof filter === 'function') {
          if (filter.call(this, evt, target, this)) {
            _dispatchEvent({
              sortable: _this,
              rootEl: originalTarget,
              name: 'filter',
              targetEl: target,
              toEl: el,
              fromEl: el,
            })

            pluginEvent('filter', _this, {
              evt: evt,
            })
            preventOnFilter && evt.cancelable && evt.preventDefault()
            return // cancel dnd
          }
        } else if (filter) {
          filter = filter.split(',').some(function (criteria) {
            criteria = closest(originalTarget, criteria.trim(), el, false)

            if (criteria) {
              _dispatchEvent({
                sortable: _this,
                rootEl: criteria,
                name: 'filter',
                targetEl: target,
                fromEl: el,
                toEl: el,
              })

              pluginEvent('filter', _this, {
                evt: evt,
              })
              return true
            }
          })

          if (filter) {
            preventOnFilter && evt.cancelable && evt.preventDefault()
            return // cancel dnd
          }
        }

        if (
          options.handle &&
          !closest(originalTarget, options.handle, el, false)
        ) {
          return
        } // Prepare `dragstart`

        this._prepareDragStart(evt, touch, target)
      },
      _prepareDragStart: function _prepareDragStart(
        /** Event */
        evt,
        /** Touch */
        touch,
        /** HTMLElement */
        target
      ) {
        var _this = this,
          el = _this.el,
          options = _this.options,
          ownerDocument = el.ownerDocument,
          dragStartFn

        if (target && !dragEl && target.parentNode === el) {
          var dragRect = getRect(target)
          rootEl = el
          dragEl = target
          parentEl = dragEl.parentNode
          nextEl = dragEl.nextSibling
          lastDownEl = target
          activeGroup = options.group
          Sortable.dragged = dragEl
          tapEvt = {
            target: dragEl,
            clientX: (touch || evt).clientX,
            clientY: (touch || evt).clientY,
          }
          tapDistanceLeft = tapEvt.clientX - dragRect.left
          tapDistanceTop = tapEvt.clientY - dragRect.top
          this._lastX = (touch || evt).clientX
          this._lastY = (touch || evt).clientY
          dragEl.style['will-change'] = 'all'

          dragStartFn = function dragStartFn() {
            pluginEvent('delayEnded', _this, {
              evt: evt,
            })

            if (Sortable.eventCanceled) {
              _this._onDrop()

              return
            } // Delayed drag has been triggered
            // we can re-enable the events: touchmove/mousemove

            _this._disableDelayedDragEvents()

            if (!FireFox && _this.nativeDraggable) {
              dragEl.draggable = true
            } // Bind the events: dragstart/dragend

            _this._triggerDragStart(evt, touch) // Drag start event

            _dispatchEvent({
              sortable: _this,
              name: 'choose',
              originalEvent: evt,
            }) // Chosen item

            toggleClass(dragEl, options.chosenClass, true)
          } // Disable "draggable"

          options.ignore.split(',').forEach(function (criteria) {
            find(dragEl, criteria.trim(), _disableDraggable)
          })
          on(ownerDocument, 'dragover', nearestEmptyInsertDetectEvent)
          on(ownerDocument, 'mousemove', nearestEmptyInsertDetectEvent)
          on(ownerDocument, 'touchmove', nearestEmptyInsertDetectEvent)
          on(ownerDocument, 'mouseup', _this._onDrop)
          on(ownerDocument, 'touchend', _this._onDrop)
          on(ownerDocument, 'touchcancel', _this._onDrop) // Make dragEl draggable (must be before delay for FireFox)

          if (FireFox && this.nativeDraggable) {
            this.options.touchStartThreshold = 4
            dragEl.draggable = true
          }

          pluginEvent('delayStart', this, {
            evt: evt,
          }) // Delay is impossible for native DnD in Edge or IE

          if (
            options.delay &&
            (!options.delayOnTouchOnly || touch) &&
            (!this.nativeDraggable || !(Edge || IE11OrLess))
          ) {
            if (Sortable.eventCanceled) {
              this._onDrop()

              return
            } // If the user moves the pointer or let go the click or touch
            // before the delay has been reached:
            // disable the delayed drag

            on(ownerDocument, 'mouseup', _this._disableDelayedDrag)
            on(ownerDocument, 'touchend', _this._disableDelayedDrag)
            on(ownerDocument, 'touchcancel', _this._disableDelayedDrag)
            on(ownerDocument, 'mousemove', _this._delayedDragTouchMoveHandler)
            on(ownerDocument, 'touchmove', _this._delayedDragTouchMoveHandler)
            options.supportPointer &&
              on(
                ownerDocument,
                'pointermove',
                _this._delayedDragTouchMoveHandler
              )
            _this._dragStartTimer = setTimeout(dragStartFn, options.delay)
          } else {
            dragStartFn()
          }
        }
      },
      _delayedDragTouchMoveHandler: function _delayedDragTouchMoveHandler(
        /** TouchEvent|PointerEvent **/
        e
      ) {
        var touch = e.touches ? e.touches[0] : e

        if (
          Math.max(
            Math.abs(touch.clientX - this._lastX),
            Math.abs(touch.clientY - this._lastY)
          ) >=
          Math.floor(
            this.options.touchStartThreshold /
              ((this.nativeDraggable && window.devicePixelRatio) || 1)
          )
        ) {
          this._disableDelayedDrag()
        }
      },
      _disableDelayedDrag: function _disableDelayedDrag() {
        dragEl && _disableDraggable(dragEl)
        clearTimeout(this._dragStartTimer)

        this._disableDelayedDragEvents()
      },
      _disableDelayedDragEvents: function _disableDelayedDragEvents() {
        var ownerDocument = this.el.ownerDocument
        off(ownerDocument, 'mouseup', this._disableDelayedDrag)
        off(ownerDocument, 'touchend', this._disableDelayedDrag)
        off(ownerDocument, 'touchcancel', this._disableDelayedDrag)
        off(ownerDocument, 'mousemove', this._delayedDragTouchMoveHandler)
        off(ownerDocument, 'touchmove', this._delayedDragTouchMoveHandler)
        off(ownerDocument, 'pointermove', this._delayedDragTouchMoveHandler)
      },
      _triggerDragStart: function _triggerDragStart(
        /** Event */
        evt,
        /** Touch */
        touch
      ) {
        touch = touch || (evt.pointerType == 'touch' && evt)

        if (!this.nativeDraggable || touch) {
          if (this.options.supportPointer) {
            on(document, 'pointermove', this._onTouchMove)
          } else if (touch) {
            on(document, 'touchmove', this._onTouchMove)
          } else {
            on(document, 'mousemove', this._onTouchMove)
          }
        } else {
          on(dragEl, 'dragend', this)
          on(rootEl, 'dragstart', this._onDragStart)
        }

        try {
          if (document.selection) {
            // Timeout neccessary for IE9
            _nextTick(function () {
              document.selection.empty()
            })
          } else {
            window.getSelection().removeAllRanges()
          }
        } catch (err) {}
      },
      _dragStarted: function _dragStarted(fallback, evt) {
        awaitingDragStarted = false

        if (rootEl && dragEl) {
          pluginEvent('dragStarted', this, {
            evt: evt,
          })

          if (this.nativeDraggable) {
            on(document, 'dragover', _checkOutsideTargetEl)
          }

          var options = this.options // Apply effect

          !fallback && toggleClass(dragEl, options.dragClass, false)
          toggleClass(dragEl, options.ghostClass, true)
          Sortable.active = this
          fallback && this._appendGhost() // Drag start event

          _dispatchEvent({
            sortable: this,
            name: 'start',
            originalEvent: evt,
          })
        } else {
          this._nulling()
        }
      },
      _emulateDragOver: function _emulateDragOver() {
        if (touchEvt) {
          this._lastX = touchEvt.clientX
          this._lastY = touchEvt.clientY

          _hideGhostForTarget()

          var target = document.elementFromPoint(
            touchEvt.clientX,
            touchEvt.clientY
          )
          var parent = target

          while (target && target.shadowRoot) {
            target = target.shadowRoot.elementFromPoint(
              touchEvt.clientX,
              touchEvt.clientY
            )
            if (target === parent) break
            parent = target
          }

          dragEl.parentNode[expando]._isOutsideThisEl(target)

          if (parent) {
            do {
              if (parent[expando]) {
                var inserted = void 0
                inserted = parent[expando]._onDragOver({
                  clientX: touchEvt.clientX,
                  clientY: touchEvt.clientY,
                  target: target,
                  rootEl: parent,
                })

                if (inserted && !this.options.dragoverBubble) {
                  break
                }
              }

              target = parent // store last element
            } while (
              /* jshint boss:true */
              (parent = parent.parentNode)
            )
          }

          _unhideGhostForTarget()
        }
      },
      _onTouchMove: function _onTouchMove(
        /**TouchEvent*/
        evt
      ) {
        if (tapEvt) {
          var options = this.options,
            fallbackTolerance = options.fallbackTolerance,
            fallbackOffset = options.fallbackOffset,
            touch = evt.touches ? evt.touches[0] : evt,
            ghostMatrix = ghostEl && matrix(ghostEl, true),
            scaleX = ghostEl && ghostMatrix && ghostMatrix.a,
            scaleY = ghostEl && ghostMatrix && ghostMatrix.d,
            relativeScrollOffset =
              PositionGhostAbsolutely &&
              ghostRelativeParent &&
              getRelativeScrollOffset(ghostRelativeParent),
            dx =
              (touch.clientX - tapEvt.clientX + fallbackOffset.x) /
                (scaleX || 1) +
              (relativeScrollOffset
                ? relativeScrollOffset[0] - ghostRelativeParentInitialScroll[0]
                : 0) /
                (scaleX || 1),
            dy =
              (touch.clientY - tapEvt.clientY + fallbackOffset.y) /
                (scaleY || 1) +
              (relativeScrollOffset
                ? relativeScrollOffset[1] - ghostRelativeParentInitialScroll[1]
                : 0) /
                (scaleY || 1) // only set the status to dragging, when we are actually dragging

          if (!Sortable.active && !awaitingDragStarted) {
            if (
              fallbackTolerance &&
              Math.max(
                Math.abs(touch.clientX - this._lastX),
                Math.abs(touch.clientY - this._lastY)
              ) < fallbackTolerance
            ) {
              return
            }

            this._onDragStart(evt, true)
          }

          if (ghostEl) {
            if (ghostMatrix) {
              ghostMatrix.e += dx - (lastDx || 0)
              ghostMatrix.f += dy - (lastDy || 0)
            } else {
              ghostMatrix = {
                a: 1,
                b: 0,
                c: 0,
                d: 1,
                e: dx,
                f: dy,
              }
            }

            var cssMatrix = 'matrix('
              .concat(ghostMatrix.a, ',')
              .concat(ghostMatrix.b, ',')
              .concat(ghostMatrix.c, ',')
              .concat(ghostMatrix.d, ',')
              .concat(ghostMatrix.e, ',')
              .concat(ghostMatrix.f, ')')
            css(ghostEl, 'webkitTransform', cssMatrix)
            css(ghostEl, 'mozTransform', cssMatrix)
            css(ghostEl, 'msTransform', cssMatrix)
            css(ghostEl, 'transform', cssMatrix)
            lastDx = dx
            lastDy = dy
            touchEvt = touch
          }

          evt.cancelable && evt.preventDefault()
        }
      },
      _appendGhost: function _appendGhost() {
        // Bug if using scale(): https://stackoverflow.com/questions/2637058
        // Not being adjusted for
        if (!ghostEl) {
          var container = this.options.fallbackOnBody ? document.body : rootEl,
            rect = getRect(
              dragEl,
              true,
              PositionGhostAbsolutely,
              true,
              container
            ),
            options = this.options // Position absolutely

          if (PositionGhostAbsolutely) {
            // Get relatively positioned parent
            ghostRelativeParent = container

            while (
              css(ghostRelativeParent, 'position') === 'static' &&
              css(ghostRelativeParent, 'transform') === 'none' &&
              ghostRelativeParent !== document
            ) {
              ghostRelativeParent = ghostRelativeParent.parentNode
            }

            if (
              ghostRelativeParent !== document.body &&
              ghostRelativeParent !== document.documentElement
            ) {
              if (ghostRelativeParent === document)
                ghostRelativeParent = getWindowScrollingElement()
              rect.top += ghostRelativeParent.scrollTop
              rect.left += ghostRelativeParent.scrollLeft
            } else {
              ghostRelativeParent = getWindowScrollingElement()
            }

            ghostRelativeParentInitialScroll =
              getRelativeScrollOffset(ghostRelativeParent)
          }

          ghostEl = dragEl.cloneNode(true)
          toggleClass(ghostEl, options.ghostClass, false)
          toggleClass(ghostEl, options.fallbackClass, true)
          toggleClass(ghostEl, options.dragClass, true)
          css(ghostEl, 'transition', '')
          css(ghostEl, 'transform', '')
          css(ghostEl, 'box-sizing', 'border-box')
          css(ghostEl, 'margin', 0)
          css(ghostEl, 'top', rect.top)
          css(ghostEl, 'left', rect.left)
          css(ghostEl, 'width', rect.width)
          css(ghostEl, 'height', rect.height)
          css(ghostEl, 'opacity', '0.8')
          css(
            ghostEl,
            'position',
            PositionGhostAbsolutely ? 'absolute' : 'fixed'
          )
          css(ghostEl, 'zIndex', '100000')
          css(ghostEl, 'pointerEvents', 'none')
          Sortable.ghost = ghostEl
          container.appendChild(ghostEl) // Set transform-origin

          css(
            ghostEl,
            'transform-origin',
            (tapDistanceLeft / parseInt(ghostEl.style.width)) * 100 +
              '% ' +
              (tapDistanceTop / parseInt(ghostEl.style.height)) * 100 +
              '%'
          )
        }
      },
      _onDragStart: function _onDragStart(
        /**Event*/
        evt,
        /**boolean*/
        fallback
      ) {
        var _this = this

        var dataTransfer = evt.dataTransfer
        var options = _this.options
        pluginEvent('dragStart', this, {
          evt: evt,
        })

        if (Sortable.eventCanceled) {
          this._onDrop()

          return
        }

        pluginEvent('setupClone', this)

        if (!Sortable.eventCanceled) {
          cloneEl = clone(dragEl)
          cloneEl.draggable = false
          cloneEl.style['will-change'] = ''

          this._hideClone()

          toggleClass(cloneEl, this.options.chosenClass, false)
          Sortable.clone = cloneEl
        } // #1143: IFrame support workaround

        _this.cloneId = _nextTick(function () {
          pluginEvent('clone', _this)
          if (Sortable.eventCanceled) return

          if (!_this.options.removeCloneOnHide) {
            rootEl.insertBefore(cloneEl, dragEl)
          }

          _this._hideClone()

          _dispatchEvent({
            sortable: _this,
            name: 'clone',
          })
        })
        !fallback && toggleClass(dragEl, options.dragClass, true) // Set proper drop events

        if (fallback) {
          ignoreNextClick = true
          _this._loopId = setInterval(_this._emulateDragOver, 50)
        } else {
          // Undo what was set in _prepareDragStart before drag started
          off(document, 'mouseup', _this._onDrop)
          off(document, 'touchend', _this._onDrop)
          off(document, 'touchcancel', _this._onDrop)

          if (dataTransfer) {
            dataTransfer.effectAllowed = 'move'
            options.setData && options.setData.call(_this, dataTransfer, dragEl)
          }

          on(document, 'drop', _this) // #1276 fix:

          css(dragEl, 'transform', 'translateZ(0)')
        }

        awaitingDragStarted = true
        _this._dragStartId = _nextTick(
          _this._dragStarted.bind(_this, fallback, evt)
        )
        on(document, 'selectstart', _this)
        moved = true

        if (Safari) {
          css(document.body, 'user-select', 'none')
        }
      },
      // Returns true - if no further action is needed (either inserted or another condition)
      _onDragOver: function _onDragOver(
        /**Event*/
        evt
      ) {
        var el = this.el,
          target = evt.target,
          dragRect,
          targetRect,
          revert,
          options = this.options,
          group = options.group,
          activeSortable = Sortable.active,
          isOwner = activeGroup === group,
          canSort = options.sort,
          fromSortable = putSortable || activeSortable,
          vertical,
          _this = this,
          completedFired = false

        if (_silent) return

        function dragOverEvent(name, extra) {
          pluginEvent(
            name,
            _this,
            _objectSpread(
              {
                evt: evt,
                isOwner: isOwner,
                axis: vertical ? 'vertical' : 'horizontal',
                revert: revert,
                dragRect: dragRect,
                targetRect: targetRect,
                canSort: canSort,
                fromSortable: fromSortable,
                target: target,
                completed: completed,
                onMove: function onMove(target, after) {
                  return _onMove(
                    rootEl,
                    el,
                    dragEl,
                    dragRect,
                    target,
                    getRect(target),
                    evt,
                    after
                  )
                },
                changed: changed,
              },
              extra
            )
          )
        } // Capture animation state

        function capture() {
          dragOverEvent('dragOverAnimationCapture')

          _this.captureAnimationState()

          if (_this !== fromSortable) {
            fromSortable.captureAnimationState()
          }
        } // Return invocation when dragEl is inserted (or completed)

        function completed(insertion) {
          dragOverEvent('dragOverCompleted', {
            insertion: insertion,
          })

          if (insertion) {
            // Clones must be hidden before folding animation to capture dragRectAbsolute properly
            if (isOwner) {
              activeSortable._hideClone()
            } else {
              activeSortable._showClone(_this)
            }

            if (_this !== fromSortable) {
              // Set ghost class to new sortable's ghost class
              toggleClass(
                dragEl,
                putSortable
                  ? putSortable.options.ghostClass
                  : activeSortable.options.ghostClass,
                false
              )
              toggleClass(dragEl, options.ghostClass, true)
            }

            if (putSortable !== _this && _this !== Sortable.active) {
              putSortable = _this
            } else if (_this === Sortable.active && putSortable) {
              putSortable = null
            } // Animation

            if (fromSortable === _this) {
              _this._ignoreWhileAnimating = target
            }

            _this.animateAll(function () {
              dragOverEvent('dragOverAnimationComplete')
              _this._ignoreWhileAnimating = null
            })

            if (_this !== fromSortable) {
              fromSortable.animateAll()
              fromSortable._ignoreWhileAnimating = null
            }
          } // Null lastTarget if it is not inside a previously swapped element

          if (
            (target === dragEl && !dragEl.animated) ||
            (target === el && !target.animated)
          ) {
            lastTarget = null
          } // no bubbling and not fallback

          if (!options.dragoverBubble && !evt.rootEl && target !== document) {
            dragEl.parentNode[expando]._isOutsideThisEl(evt.target) // Do not detect for empty insert if already inserted

            !insertion && nearestEmptyInsertDetectEvent(evt)
          }

          !options.dragoverBubble &&
            evt.stopPropagation &&
            evt.stopPropagation()
          return (completedFired = true)
        } // Call when dragEl has been inserted

        function changed() {
          newIndex = index(dragEl)
          newDraggableIndex = index(dragEl, options.draggable)

          _dispatchEvent({
            sortable: _this,
            name: 'change',
            toEl: el,
            newIndex: newIndex,
            newDraggableIndex: newDraggableIndex,
            originalEvent: evt,
          })
        }

        if (evt.preventDefault !== void 0) {
          evt.cancelable && evt.preventDefault()
        }

        target = closest(target, options.draggable, el, true)
        dragOverEvent('dragOver')
        if (Sortable.eventCanceled) return completedFired

        if (
          dragEl.contains(evt.target) ||
          (target.animated && target.animatingX && target.animatingY) ||
          _this._ignoreWhileAnimating === target
        ) {
          return completed(false)
        }

        ignoreNextClick = false

        if (
          activeSortable &&
          !options.disabled &&
          (isOwner
            ? canSort || (revert = !rootEl.contains(dragEl)) // Reverting item into the original list
            : putSortable === this ||
              ((this.lastPutMode = activeGroup.checkPull(
                this,
                activeSortable,
                dragEl,
                evt
              )) &&
                group.checkPut(this, activeSortable, dragEl, evt)))
        ) {
          vertical = this._getDirection(evt, target) === 'vertical'
          dragRect = getRect(dragEl)
          dragOverEvent('dragOverValid')
          if (Sortable.eventCanceled) return completedFired

          if (revert) {
            parentEl = rootEl // actualization

            capture()

            this._hideClone()

            dragOverEvent('revert')

            if (!Sortable.eventCanceled) {
              if (nextEl) {
                rootEl.insertBefore(dragEl, nextEl)
              } else {
                rootEl.appendChild(dragEl)
              }
            }

            return completed(true)
          }

          var elLastChild = lastChild(el, options.draggable)

          if (
            !elLastChild ||
            (_ghostIsLast(evt, vertical, this) && !elLastChild.animated)
          ) {
            // If already at end of list: Do not insert
            if (elLastChild === dragEl) {
              return completed(false)
            } // assign target only if condition is true

            if (elLastChild && el === evt.target) {
              target = elLastChild
            }

            if (target) {
              targetRect = getRect(target)
            }

            if (
              _onMove(
                rootEl,
                el,
                dragEl,
                dragRect,
                target,
                targetRect,
                evt,
                !!target
              ) !== false
            ) {
              capture()
              el.appendChild(dragEl)
              parentEl = el // actualization

              changed()
              return completed(true)
            }
          } else if (target.parentNode === el) {
            targetRect = getRect(target)
            var direction = 0,
              targetBeforeFirstSwap,
              differentLevel = dragEl.parentNode !== el,
              differentRowCol = !_dragElInRowColumn(
                (dragEl.animated && dragEl.toRect) || dragRect,
                (target.animated && target.toRect) || targetRect,
                vertical
              ),
              side1 = vertical ? 'top' : 'left',
              scrolledPastTop =
                isScrolledPast(target, 'top', 'top') ||
                isScrolledPast(dragEl, 'top', 'top'),
              scrollBefore = scrolledPastTop
                ? scrolledPastTop.scrollTop
                : void 0

            if (lastTarget !== target) {
              targetBeforeFirstSwap = targetRect[side1]
              pastFirstInvertThresh = false
              isCircumstantialInvert =
                (!differentRowCol && options.invertSwap) || differentLevel
            }

            direction = _getSwapDirection(
              evt,
              target,
              targetRect,
              vertical,
              differentRowCol ? 1 : options.swapThreshold,
              options.invertedSwapThreshold == null
                ? options.swapThreshold
                : options.invertedSwapThreshold,
              isCircumstantialInvert,
              lastTarget === target
            )
            var sibling

            if (direction !== 0) {
              // Check if target is beside dragEl in respective direction (ignoring hidden elements)
              var dragIndex = index(dragEl)

              do {
                dragIndex -= direction
                sibling = parentEl.children[dragIndex]
              } while (
                sibling &&
                (css(sibling, 'display') === 'none' || sibling === ghostEl)
              )
            } // If dragEl is already beside target: Do not insert

            if (direction === 0 || sibling === target) {
              return completed(false)
            }

            lastTarget = target
            lastDirection = direction
            var nextSibling = target.nextElementSibling,
              after = false
            after = direction === 1

            var moveVector = _onMove(
              rootEl,
              el,
              dragEl,
              dragRect,
              target,
              targetRect,
              evt,
              after
            )

            if (moveVector !== false) {
              if (moveVector === 1 || moveVector === -1) {
                after = moveVector === 1
              }

              _silent = true
              setTimeout(_unsilent, 30)
              capture()

              if (after && !nextSibling) {
                el.appendChild(dragEl)
              } else {
                target.parentNode.insertBefore(
                  dragEl,
                  after ? nextSibling : target
                )
              } // Undo chrome's scroll adjustment (has no effect on other browsers)

              if (scrolledPastTop) {
                scrollBy(
                  scrolledPastTop,
                  0,
                  scrollBefore - scrolledPastTop.scrollTop
                )
              }

              parentEl = dragEl.parentNode // actualization
              // must be done before animation

              if (
                targetBeforeFirstSwap !== undefined &&
                !isCircumstantialInvert
              ) {
                targetMoveDistance = Math.abs(
                  targetBeforeFirstSwap - getRect(target)[side1]
                )
              }

              changed()
              return completed(true)
            }
          }

          if (el.contains(dragEl)) {
            return completed(false)
          }
        }

        return false
      },
      _ignoreWhileAnimating: null,
      _offMoveEvents: function _offMoveEvents() {
        off(document, 'mousemove', this._onTouchMove)
        off(document, 'touchmove', this._onTouchMove)
        off(document, 'pointermove', this._onTouchMove)
        off(document, 'dragover', nearestEmptyInsertDetectEvent)
        off(document, 'mousemove', nearestEmptyInsertDetectEvent)
        off(document, 'touchmove', nearestEmptyInsertDetectEvent)
      },
      _offUpEvents: function _offUpEvents() {
        var ownerDocument = this.el.ownerDocument
        off(ownerDocument, 'mouseup', this._onDrop)
        off(ownerDocument, 'touchend', this._onDrop)
        off(ownerDocument, 'pointerup', this._onDrop)
        off(ownerDocument, 'touchcancel', this._onDrop)
        off(document, 'selectstart', this)
      },
      _onDrop: function _onDrop(
        /**Event*/
        evt
      ) {
        var el = this.el,
          options = this.options // Get the index of the dragged element within its parent

        newIndex = index(dragEl)
        newDraggableIndex = index(dragEl, options.draggable)
        pluginEvent('drop', this, {
          evt: evt,
        })
        parentEl = dragEl && dragEl.parentNode // Get again after plugin event

        newIndex = index(dragEl)
        newDraggableIndex = index(dragEl, options.draggable)

        if (Sortable.eventCanceled) {
          this._nulling()

          return
        }

        awaitingDragStarted = false
        isCircumstantialInvert = false
        pastFirstInvertThresh = false
        clearInterval(this._loopId)
        clearTimeout(this._dragStartTimer)

        _cancelNextTick(this.cloneId)

        _cancelNextTick(this._dragStartId) // Unbind events

        if (this.nativeDraggable) {
          off(document, 'drop', this)
          off(el, 'dragstart', this._onDragStart)
        }

        this._offMoveEvents()

        this._offUpEvents()

        if (Safari) {
          css(document.body, 'user-select', '')
        }

        css(dragEl, 'transform', '')

        if (evt) {
          if (moved) {
            evt.cancelable && evt.preventDefault()
            !options.dropBubble && evt.stopPropagation()
          }

          ghostEl &&
            ghostEl.parentNode &&
            ghostEl.parentNode.removeChild(ghostEl)

          if (
            rootEl === parentEl ||
            (putSortable && putSortable.lastPutMode !== 'clone')
          ) {
            // Remove clone(s)
            cloneEl &&
              cloneEl.parentNode &&
              cloneEl.parentNode.removeChild(cloneEl)
          }

          if (dragEl) {
            if (this.nativeDraggable) {
              off(dragEl, 'dragend', this)
            }

            _disableDraggable(dragEl)

            dragEl.style['will-change'] = '' // Remove classes
            // ghostClass is added in dragStarted

            if (moved && !awaitingDragStarted) {
              toggleClass(
                dragEl,
                putSortable
                  ? putSortable.options.ghostClass
                  : this.options.ghostClass,
                false
              )
            }

            toggleClass(dragEl, this.options.chosenClass, false) // Drag stop event

            _dispatchEvent({
              sortable: this,
              name: 'unchoose',
              toEl: parentEl,
              newIndex: null,
              newDraggableIndex: null,
              originalEvent: evt,
            })

            if (rootEl !== parentEl) {
              if (newIndex >= 0) {
                // Add event
                _dispatchEvent({
                  rootEl: parentEl,
                  name: 'add',
                  toEl: parentEl,
                  fromEl: rootEl,
                  originalEvent: evt,
                }) // Remove event

                _dispatchEvent({
                  sortable: this,
                  name: 'remove',
                  toEl: parentEl,
                  originalEvent: evt,
                }) // drag from one list and drop into another

                _dispatchEvent({
                  rootEl: parentEl,
                  name: 'sort',
                  toEl: parentEl,
                  fromEl: rootEl,
                  originalEvent: evt,
                })

                _dispatchEvent({
                  sortable: this,
                  name: 'sort',
                  toEl: parentEl,
                  originalEvent: evt,
                })
              }

              putSortable && putSortable.save()
            } else {
              if (newIndex !== oldIndex) {
                if (newIndex >= 0) {
                  // drag & drop within the same list
                  _dispatchEvent({
                    sortable: this,
                    name: 'update',
                    toEl: parentEl,
                    originalEvent: evt,
                  })

                  _dispatchEvent({
                    sortable: this,
                    name: 'sort',
                    toEl: parentEl,
                    originalEvent: evt,
                  })
                }
              }
            }

            if (Sortable.active) {
              /* jshint eqnull:true */
              if (newIndex == null || newIndex === -1) {
                newIndex = oldIndex
                newDraggableIndex = oldDraggableIndex
              }

              _dispatchEvent({
                sortable: this,
                name: 'end',
                toEl: parentEl,
                originalEvent: evt,
              }) // Save sorting

              this.save()
            }
          }
        }

        this._nulling()
      },
      _nulling: function _nulling() {
        pluginEvent('nulling', this)
        rootEl =
          dragEl =
          parentEl =
          ghostEl =
          nextEl =
          cloneEl =
          lastDownEl =
          cloneHidden =
          tapEvt =
          touchEvt =
          moved =
          newIndex =
          newDraggableIndex =
          oldIndex =
          oldDraggableIndex =
          lastTarget =
          lastDirection =
          putSortable =
          activeGroup =
          Sortable.dragged =
          Sortable.ghost =
          Sortable.clone =
          Sortable.active =
            null
        savedInputChecked.forEach(function (el) {
          el.checked = true
        })
        savedInputChecked.length = lastDx = lastDy = 0
      },
      handleEvent: function handleEvent(
        /**Event*/
        evt
      ) {
        switch (evt.type) {
          case 'drop':
          case 'dragend':
            this._onDrop(evt)

            break

          case 'dragenter':
          case 'dragover':
            if (dragEl) {
              this._onDragOver(evt)

              _globalDragOver(evt)
            }

            break

          case 'selectstart':
            evt.preventDefault()
            break
        }
      },

      /**
       * Serializes the item into an array of string.
       * @returns {String[]}
       */
      toArray: function toArray() {
        var order = [],
          el,
          children = this.el.children,
          i = 0,
          n = children.length,
          options = this.options

        for (; i < n; i++) {
          el = children[i]

          if (closest(el, options.draggable, this.el, false)) {
            order.push(el.getAttribute(options.dataIdAttr) || _generateId(el))
          }
        }

        return order
      },

      /**
       * Sorts the elements according to the array.
       * @param  {String[]}  order  order of the items
       */
      sort: function sort(order) {
        var items = {},
          rootEl = this.el
        this.toArray().forEach(function (id, i) {
          var el = rootEl.children[i]

          if (closest(el, this.options.draggable, rootEl, false)) {
            items[id] = el
          }
        }, this)
        order.forEach(function (id) {
          if (items[id]) {
            rootEl.removeChild(items[id])
            rootEl.appendChild(items[id])
          }
        })
      },

      /**
       * Save the current sorting
       */
      save: function save() {
        var store = this.options.store
        store && store.set && store.set(this)
      },

      /**
       * For each element in the set, get the first element that matches the selector by testing the element itself and traversing up through its ancestors in the DOM tree.
       * @param   {HTMLElement}  el
       * @param   {String}       [selector]  default: `options.draggable`
       * @returns {HTMLElement|null}
       */
      closest: function closest$1(el, selector) {
        return closest(el, selector || this.options.draggable, this.el, false)
      },

      /**
       * Set/get option
       * @param   {string} name
       * @param   {*}      [value]
       * @returns {*}
       */
      option: function option(name, value) {
        var options = this.options

        if (value === void 0) {
          return options[name]
        } else {
          var modifiedValue = PluginManager.modifyOption(this, name, value)

          if (typeof modifiedValue !== 'undefined') {
            options[name] = modifiedValue
          } else {
            options[name] = value
          }

          if (name === 'group') {
            _prepareGroup(options)
          }
        }
      },

      /**
       * Destroy
       */
      destroy: function destroy() {
        pluginEvent('destroy', this)
        var el = this.el
        el[expando] = null
        off(el, 'mousedown', this._onTapStart)
        off(el, 'touchstart', this._onTapStart)
        off(el, 'pointerdown', this._onTapStart)

        if (this.nativeDraggable) {
          off(el, 'dragover', this)
          off(el, 'dragenter', this)
        } // Remove draggable attributes

        Array.prototype.forEach.call(
          el.querySelectorAll('[draggable]'),
          function (el) {
            el.removeAttribute('draggable')
          }
        )

        this._onDrop()

        this._disableDelayedDragEvents()

        sortables.splice(sortables.indexOf(this.el), 1)
        this.el = el = null
      },
      _hideClone: function _hideClone() {
        if (!cloneHidden) {
          pluginEvent('hideClone', this)
          if (Sortable.eventCanceled) return
          css(cloneEl, 'display', 'none')

          if (this.options.removeCloneOnHide && cloneEl.parentNode) {
            cloneEl.parentNode.removeChild(cloneEl)
          }

          cloneHidden = true
        }
      },
      _showClone: function _showClone(putSortable) {
        if (putSortable.lastPutMode !== 'clone') {
          this._hideClone()

          return
        }

        if (cloneHidden) {
          pluginEvent('showClone', this)
          if (Sortable.eventCanceled) return // show clone at dragEl or original position

          if (rootEl.contains(dragEl) && !this.options.group.revertClone) {
            rootEl.insertBefore(cloneEl, dragEl)
          } else if (nextEl) {
            rootEl.insertBefore(cloneEl, nextEl)
          } else {
            rootEl.appendChild(cloneEl)
          }

          if (this.options.group.revertClone) {
            this.animate(dragEl, cloneEl)
          }

          css(cloneEl, 'display', '')
          cloneHidden = false
        }
      },
    }

  function _globalDragOver(
    /**Event*/
    evt
  ) {
    if (evt.dataTransfer) {
      evt.dataTransfer.dropEffect = 'move'
    }

    evt.cancelable && evt.preventDefault()
  }

  function _onMove(
    fromEl,
    toEl,
    dragEl,
    dragRect,
    targetEl,
    targetRect,
    originalEvent,
    willInsertAfter
  ) {
    var evt,
      sortable = fromEl[expando],
      onMoveFn = sortable.options.onMove,
      retVal // Support for new CustomEvent feature

    if (window.CustomEvent && !IE11OrLess && !Edge) {
      evt = new CustomEvent('move', {
        bubbles: true,
        cancelable: true,
      })
    } else {
      evt = document.createEvent('Event')
      evt.initEvent('move', true, true)
    }

    evt.to = toEl
    evt.from = fromEl
    evt.dragged = dragEl
    evt.draggedRect = dragRect
    evt.related = targetEl || toEl
    evt.relatedRect = targetRect || getRect(toEl)
    evt.willInsertAfter = willInsertAfter
    evt.originalEvent = originalEvent
    fromEl.dispatchEvent(evt)

    if (onMoveFn) {
      retVal = onMoveFn.call(sortable, evt, originalEvent)
    }

    return retVal
  }

  function _disableDraggable(el) {
    el.draggable = false
  }

  function _unsilent() {
    _silent = false
  }

  function _ghostIsLast(evt, vertical, sortable) {
    var rect = getRect(lastChild(sortable.el, sortable.options.draggable))
    var spacer = 10
    return vertical
      ? evt.clientX > rect.right + spacer ||
          (evt.clientX <= rect.right &&
            evt.clientY > rect.bottom &&
            evt.clientX >= rect.left)
      : (evt.clientX > rect.right && evt.clientY > rect.top) ||
          (evt.clientX <= rect.right && evt.clientY > rect.bottom + spacer)
  }

  function _getSwapDirection(
    evt,
    target,
    targetRect,
    vertical,
    swapThreshold,
    invertedSwapThreshold,
    invertSwap,
    isLastTarget
  ) {
    var mouseOnAxis = vertical ? evt.clientY : evt.clientX,
      targetLength = vertical ? targetRect.height : targetRect.width,
      targetS1 = vertical ? targetRect.top : targetRect.left,
      targetS2 = vertical ? targetRect.bottom : targetRect.right,
      invert = false

    if (!invertSwap) {
      // Never invert or create dragEl shadow when target movemenet causes mouse to move past the end of regular swapThreshold
      if (isLastTarget && targetMoveDistance < targetLength * swapThreshold) {
        // multiplied only by swapThreshold because mouse will already be inside target by (1 - threshold) * targetLength / 2
        // check if past first invert threshold on side opposite of lastDirection
        if (
          !pastFirstInvertThresh &&
          (lastDirection === 1
            ? mouseOnAxis >
              targetS1 + (targetLength * invertedSwapThreshold) / 2
            : mouseOnAxis <
              targetS2 - (targetLength * invertedSwapThreshold) / 2)
        ) {
          // past first invert threshold, do not restrict inverted threshold to dragEl shadow
          pastFirstInvertThresh = true
        }

        if (!pastFirstInvertThresh) {
          // dragEl shadow (target move distance shadow)
          if (
            lastDirection === 1
              ? mouseOnAxis < targetS1 + targetMoveDistance // over dragEl shadow
              : mouseOnAxis > targetS2 - targetMoveDistance
          ) {
            return -lastDirection
          }
        } else {
          invert = true
        }
      } else {
        // Regular
        if (
          mouseOnAxis > targetS1 + (targetLength * (1 - swapThreshold)) / 2 &&
          mouseOnAxis < targetS2 - (targetLength * (1 - swapThreshold)) / 2
        ) {
          return _getInsertDirection(target)
        }
      }
    }

    invert = invert || invertSwap

    if (invert) {
      // Invert of regular
      if (
        mouseOnAxis < targetS1 + (targetLength * invertedSwapThreshold) / 2 ||
        mouseOnAxis > targetS2 - (targetLength * invertedSwapThreshold) / 2
      ) {
        return mouseOnAxis > targetS1 + targetLength / 2 ? 1 : -1
      }
    }

    return 0
  }
  /**
   * Gets the direction dragEl must be swapped relative to target in order to make it
   * seem that dragEl has been "inserted" into that element's position
   * @param  {HTMLElement} target       The target whose position dragEl is being inserted at
   * @return {Number}                   Direction dragEl must be swapped
   */

  function _getInsertDirection(target) {
    if (index(dragEl) < index(target)) {
      return 1
    } else {
      return -1
    }
  }
  /**
   * Generate id
   * @param   {HTMLElement} el
   * @returns {String}
   * @private
   */

  function _generateId(el) {
    var str = el.tagName + el.className + el.src + el.href + el.textContent,
      i = str.length,
      sum = 0

    while (i--) {
      sum += str.charCodeAt(i)
    }

    return sum.toString(36)
  }

  function _saveInputCheckedState(root) {
    savedInputChecked.length = 0
    var inputs = root.getElementsByTagName('input')
    var idx = inputs.length

    while (idx--) {
      var el = inputs[idx]
      el.checked && savedInputChecked.push(el)
    }
  }

  function _nextTick(fn) {
    return setTimeout(fn, 0)
  }

  function _cancelNextTick(id) {
    return clearTimeout(id)
  } // Fixed #973:

  if (documentExists) {
    on(document, 'touchmove', function (evt) {
      if ((Sortable.active || awaitingDragStarted) && evt.cancelable) {
        evt.preventDefault()
      }
    })
  } // Export utils

  Sortable.utils = {
    on: on,
    off: off,
    css: css,
    find: find,
    is: function is(el, selector) {
      return !!closest(el, selector, el, false)
    },
    extend: extend,
    throttle: throttle,
    closest: closest,
    toggleClass: toggleClass,
    clone: clone,
    index: index,
    nextTick: _nextTick,
    cancelNextTick: _cancelNextTick,
    detectDirection: _detectDirection,
    getChild: getChild,
  }
  /**
   * Get the Sortable instance of an element
   * @param  {HTMLElement} element The element
   * @return {Sortable|undefined}         The instance of Sortable
   */

  Sortable.get = function (element) {
    return element[expando]
  }
  /**
   * Mount a plugin to Sortable
   * @param  {...SortablePlugin|SortablePlugin[]} plugins       Plugins being mounted
   */

  Sortable.mount = function () {
    for (
      var _len = arguments.length, plugins = new Array(_len), _key = 0;
      _key < _len;
      _key++
    ) {
      plugins[_key] = arguments[_key]
    }

    if (plugins[0].constructor === Array) plugins = plugins[0]
    plugins.forEach(function (plugin) {
      if (!plugin.prototype || !plugin.prototype.constructor) {
        throw 'Sortable: Mounted plugin must be a constructor function, not '.concat(
          {}.toString.call(plugin)
        )
      }

      if (plugin.utils)
        Sortable.utils = _objectSpread({}, Sortable.utils, plugin.utils)
      PluginManager.mount(plugin)
    })
  }
  /**
   * Create sortable instance
   * @param {HTMLElement}  el
   * @param {Object}      [options]
   */

  Sortable.create = function (el, options) {
    return new Sortable(el, options)
  } // Export

  Sortable.version = version

  var autoScrolls = [],
    scrollEl,
    scrollRootEl,
    scrolling = false,
    lastAutoScrollX,
    lastAutoScrollY,
    touchEvt$1,
    pointerElemChangedInterval

  function AutoScrollPlugin() {
    function AutoScroll() {
      this.defaults = {
        scroll: true,
        scrollSensitivity: 30,
        scrollSpeed: 10,
        bubbleScroll: true,
      } // Bind all private methods

      for (var fn in this) {
        if (fn.charAt(0) === '_' && typeof this[fn] === 'function') {
          this[fn] = this[fn].bind(this)
        }
      }
    }

    AutoScroll.prototype = {
      dragStarted: function dragStarted(_ref) {
        var originalEvent = _ref.originalEvent

        if (this.sortable.nativeDraggable) {
          on(document, 'dragover', this._handleAutoScroll)
        } else {
          if (this.options.supportPointer) {
            on(document, 'pointermove', this._handleFallbackAutoScroll)
          } else if (originalEvent.touches) {
            on(document, 'touchmove', this._handleFallbackAutoScroll)
          } else {
            on(document, 'mousemove', this._handleFallbackAutoScroll)
          }
        }
      },
      dragOverCompleted: function dragOverCompleted(_ref2) {
        var originalEvent = _ref2.originalEvent

        // For when bubbling is canceled and using fallback (fallback 'touchmove' always reached)
        if (!this.options.dragOverBubble && !originalEvent.rootEl) {
          this._handleAutoScroll(originalEvent)
        }
      },
      drop: function drop() {
        if (this.sortable.nativeDraggable) {
          off(document, 'dragover', this._handleAutoScroll)
        } else {
          off(document, 'pointermove', this._handleFallbackAutoScroll)
          off(document, 'touchmove', this._handleFallbackAutoScroll)
          off(document, 'mousemove', this._handleFallbackAutoScroll)
        }

        clearPointerElemChangedInterval()
        clearAutoScrolls()
        cancelThrottle()
      },
      nulling: function nulling() {
        touchEvt$1 =
          scrollRootEl =
          scrollEl =
          scrolling =
          pointerElemChangedInterval =
          lastAutoScrollX =
          lastAutoScrollY =
            null
        autoScrolls.length = 0
      },
      _handleFallbackAutoScroll: function _handleFallbackAutoScroll(evt) {
        this._handleAutoScroll(evt, true)
      },
      _handleAutoScroll: function _handleAutoScroll(evt, fallback) {
        var _this = this

        var x = (evt.touches ? evt.touches[0] : evt).clientX,
          y = (evt.touches ? evt.touches[0] : evt).clientY,
          elem = document.elementFromPoint(x, y)
        touchEvt$1 = evt // IE does not seem to have native autoscroll,
        // Edge's autoscroll seems too conditional,
        // MACOS Safari does not have autoscroll,
        // Firefox and Chrome are good

        if (fallback || Edge || IE11OrLess || Safari) {
          autoScroll(evt, this.options, elem, fallback) // Listener for pointer element change

          var ogElemScroller = getParentAutoScrollElement(elem, true)

          if (
            scrolling &&
            (!pointerElemChangedInterval ||
              x !== lastAutoScrollX ||
              y !== lastAutoScrollY)
          ) {
            pointerElemChangedInterval && clearPointerElemChangedInterval() // Detect for pointer elem change, emulating native DnD behaviour

            pointerElemChangedInterval = setInterval(function () {
              var newElem = getParentAutoScrollElement(
                document.elementFromPoint(x, y),
                true
              )

              if (newElem !== ogElemScroller) {
                ogElemScroller = newElem
                clearAutoScrolls()
              }

              autoScroll(evt, _this.options, newElem, fallback)
            }, 10)
            lastAutoScrollX = x
            lastAutoScrollY = y
          }
        } else {
          // if DnD is enabled (and browser has good autoscrolling), first autoscroll will already scroll, so get parent autoscroll of first autoscroll
          if (
            !this.options.bubbleScroll ||
            getParentAutoScrollElement(elem, true) ===
              getWindowScrollingElement()
          ) {
            clearAutoScrolls()
            return
          }

          autoScroll(
            evt,
            this.options,
            getParentAutoScrollElement(elem, false),
            false
          )
        }
      },
    }
    return _extends(AutoScroll, {
      pluginName: 'scroll',
      initializeByDefault: true,
    })
  }

  function clearAutoScrolls() {
    autoScrolls.forEach(function (autoScroll) {
      clearInterval(autoScroll.pid)
    })
    autoScrolls = []
  }

  function clearPointerElemChangedInterval() {
    clearInterval(pointerElemChangedInterval)
  }

  var autoScroll = throttle(function (evt, options, rootEl, isFallback) {
    // Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=505521
    if (!options.scroll) return
    var x = (evt.touches ? evt.touches[0] : evt).clientX,
      y = (evt.touches ? evt.touches[0] : evt).clientY,
      sens = options.scrollSensitivity,
      speed = options.scrollSpeed,
      winScroller = getWindowScrollingElement()
    var scrollThisInstance = false,
      scrollCustomFn // New scroll root, set scrollEl

    if (scrollRootEl !== rootEl) {
      scrollRootEl = rootEl
      clearAutoScrolls()
      scrollEl = options.scroll
      scrollCustomFn = options.scrollFn

      if (scrollEl === true) {
        scrollEl = getParentAutoScrollElement(rootEl, true)
      }
    }

    var layersOut = 0
    var currentParent = scrollEl

    do {
      var el = currentParent,
        rect = getRect(el),
        top = rect.top,
        bottom = rect.bottom,
        left = rect.left,
        right = rect.right,
        width = rect.width,
        height = rect.height,
        canScrollX = void 0,
        canScrollY = void 0,
        scrollWidth = el.scrollWidth,
        scrollHeight = el.scrollHeight,
        elCSS = css(el),
        scrollPosX = el.scrollLeft,
        scrollPosY = el.scrollTop

      if (el === winScroller) {
        canScrollX =
          width < scrollWidth &&
          (elCSS.overflowX === 'auto' ||
            elCSS.overflowX === 'scroll' ||
            elCSS.overflowX === 'visible')
        canScrollY =
          height < scrollHeight &&
          (elCSS.overflowY === 'auto' ||
            elCSS.overflowY === 'scroll' ||
            elCSS.overflowY === 'visible')
      } else {
        canScrollX =
          width < scrollWidth &&
          (elCSS.overflowX === 'auto' || elCSS.overflowX === 'scroll')
        canScrollY =
          height < scrollHeight &&
          (elCSS.overflowY === 'auto' || elCSS.overflowY === 'scroll')
      }

      var vx =
        canScrollX &&
        (Math.abs(right - x) <= sens && scrollPosX + width < scrollWidth) -
          (Math.abs(left - x) <= sens && !!scrollPosX)
      var vy =
        canScrollY &&
        (Math.abs(bottom - y) <= sens && scrollPosY + height < scrollHeight) -
          (Math.abs(top - y) <= sens && !!scrollPosY)

      if (!autoScrolls[layersOut]) {
        for (var i = 0; i <= layersOut; i++) {
          if (!autoScrolls[i]) {
            autoScrolls[i] = {}
          }
        }
      }

      if (
        autoScrolls[layersOut].vx != vx ||
        autoScrolls[layersOut].vy != vy ||
        autoScrolls[layersOut].el !== el
      ) {
        autoScrolls[layersOut].el = el
        autoScrolls[layersOut].vx = vx
        autoScrolls[layersOut].vy = vy
        clearInterval(autoScrolls[layersOut].pid)

        if (vx != 0 || vy != 0) {
          scrollThisInstance = true
          /* jshint loopfunc:true */

          autoScrolls[layersOut].pid = setInterval(
            function () {
              // emulate drag over during autoscroll (fallback), emulating native DnD behaviour
              if (isFallback && this.layer === 0) {
                Sortable.active._onTouchMove(touchEvt$1) // To move ghost if it is positioned absolutely
              }

              var scrollOffsetY = autoScrolls[this.layer].vy
                ? autoScrolls[this.layer].vy * speed
                : 0
              var scrollOffsetX = autoScrolls[this.layer].vx
                ? autoScrolls[this.layer].vx * speed
                : 0

              if (typeof scrollCustomFn === 'function') {
                if (
                  scrollCustomFn.call(
                    Sortable.dragged.parentNode[expando],
                    scrollOffsetX,
                    scrollOffsetY,
                    evt,
                    touchEvt$1,
                    autoScrolls[this.layer].el
                  ) !== 'continue'
                ) {
                  return
                }
              }

              scrollBy(autoScrolls[this.layer].el, scrollOffsetX, scrollOffsetY)
            }.bind({
              layer: layersOut,
            }),
            24
          )
        }
      }

      layersOut++
    } while (options.bubbleScroll && currentParent !== winScroller && (currentParent = getParentAutoScrollElement(currentParent, false)))

    scrolling = scrollThisInstance // in case another function catches scrolling as false in between when it is not
  }, 30)

  var drop = function drop(_ref) {
    var originalEvent = _ref.originalEvent,
      putSortable = _ref.putSortable,
      dragEl = _ref.dragEl,
      activeSortable = _ref.activeSortable,
      dispatchSortableEvent = _ref.dispatchSortableEvent,
      hideGhostForTarget = _ref.hideGhostForTarget,
      unhideGhostForTarget = _ref.unhideGhostForTarget
    if (!originalEvent) return
    var toSortable = putSortable || activeSortable
    hideGhostForTarget()
    var touch =
      originalEvent.changedTouches && originalEvent.changedTouches.length
        ? originalEvent.changedTouches[0]
        : originalEvent
    var target = document.elementFromPoint(touch.clientX, touch.clientY)
    unhideGhostForTarget()

    if (toSortable && !toSortable.el.contains(target)) {
      dispatchSortableEvent('spill')
      this.onSpill({
        dragEl: dragEl,
        putSortable: putSortable,
      })
    }
  }

  function Revert() {}

  Revert.prototype = {
    startIndex: null,
    dragStart: function dragStart(_ref2) {
      var oldDraggableIndex = _ref2.oldDraggableIndex
      this.startIndex = oldDraggableIndex
    },
    onSpill: function onSpill(_ref3) {
      var dragEl = _ref3.dragEl,
        putSortable = _ref3.putSortable
      this.sortable.captureAnimationState()

      if (putSortable) {
        putSortable.captureAnimationState()
      }

      var nextSibling = getChild(
        this.sortable.el,
        this.startIndex,
        this.options
      )

      if (nextSibling) {
        this.sortable.el.insertBefore(dragEl, nextSibling)
      } else {
        this.sortable.el.appendChild(dragEl)
      }

      this.sortable.animateAll()

      if (putSortable) {
        putSortable.animateAll()
      }
    },
    drop: drop,
  }

  _extends(Revert, {
    pluginName: 'revertOnSpill',
  })

  function Remove() {}

  Remove.prototype = {
    onSpill: function onSpill(_ref4) {
      var dragEl = _ref4.dragEl,
        putSortable = _ref4.putSortable
      var parentSortable = putSortable || this.sortable
      parentSortable.captureAnimationState()
      dragEl.parentNode && dragEl.parentNode.removeChild(dragEl)
      parentSortable.animateAll()
    },
    drop: drop,
  }

  _extends(Remove, {
    pluginName: 'removeOnSpill',
  })

  var lastSwapEl

  function SwapPlugin() {
    function Swap() {
      this.defaults = {
        swapClass: 'sortable-swap-highlight',
      }
    }

    Swap.prototype = {
      dragStart: function dragStart(_ref) {
        var dragEl = _ref.dragEl
        lastSwapEl = dragEl
      },
      dragOverValid: function dragOverValid(_ref2) {
        var completed = _ref2.completed,
          target = _ref2.target,
          onMove = _ref2.onMove,
          activeSortable = _ref2.activeSortable,
          changed = _ref2.changed,
          cancel = _ref2.cancel
        if (!activeSortable.options.swap) return
        var el = this.sortable.el,
          options = this.options

        if (target && target !== el) {
          var prevSwapEl = lastSwapEl

          if (onMove(target) !== false) {
            toggleClass(target, options.swapClass, true)
            lastSwapEl = target
          } else {
            lastSwapEl = null
          }

          if (prevSwapEl && prevSwapEl !== lastSwapEl) {
            toggleClass(prevSwapEl, options.swapClass, false)
          }
        }

        changed()
        completed(true)
        cancel()
      },
      drop: function drop(_ref3) {
        var activeSortable = _ref3.activeSortable,
          putSortable = _ref3.putSortable,
          dragEl = _ref3.dragEl
        var toSortable = putSortable || this.sortable
        var options = this.options
        lastSwapEl && toggleClass(lastSwapEl, options.swapClass, false)

        if (
          lastSwapEl &&
          (options.swap || (putSortable && putSortable.options.swap))
        ) {
          if (dragEl !== lastSwapEl) {
            toSortable.captureAnimationState()
            if (toSortable !== activeSortable)
              activeSortable.captureAnimationState()
            swapNodes(dragEl, lastSwapEl)
            toSortable.animateAll()
            if (toSortable !== activeSortable) activeSortable.animateAll()
          }
        }
      },
      nulling: function nulling() {
        lastSwapEl = null
      },
    }
    return _extends(Swap, {
      pluginName: 'swap',
      eventProperties: function eventProperties() {
        return {
          swapItem: lastSwapEl,
        }
      },
    })
  }

  function swapNodes(n1, n2) {
    var p1 = n1.parentNode,
      p2 = n2.parentNode,
      i1,
      i2
    if (!p1 || !p2 || p1.isEqualNode(n2) || p2.isEqualNode(n1)) return
    i1 = index(n1)
    i2 = index(n2)

    if (p1.isEqualNode(p2) && i1 < i2) {
      i2++
    }

    p1.insertBefore(n2, p1.children[i1])
    p2.insertBefore(n1, p2.children[i2])
  }

  var multiDragElements = [],
    multiDragClones = [],
    lastMultiDragSelect,
    // for selection with modifier key down (SHIFT)
    multiDragSortable,
    initialFolding = false,
    // Initial multi-drag fold when drag started
    folding = false,
    // Folding any other time
    dragStarted = false,
    dragEl$1,
    clonesFromRect,
    clonesHidden

  function MultiDragPlugin() {
    function MultiDrag(sortable) {
      // Bind all private methods
      for (var fn in this) {
        if (fn.charAt(0) === '_' && typeof this[fn] === 'function') {
          this[fn] = this[fn].bind(this)
        }
      }

      if (sortable.options.supportPointer) {
        on(document, 'pointerup', this._deselectMultiDrag)
      } else {
        on(document, 'mouseup', this._deselectMultiDrag)
        on(document, 'touchend', this._deselectMultiDrag)
      }

      on(document, 'keydown', this._checkKeyDown)
      on(document, 'keyup', this._checkKeyUp)
      this.defaults = {
        selectedClass: 'sortable-selected',
        multiDragKey: null,
        setData: function setData(dataTransfer, dragEl) {
          var data = ''

          if (multiDragElements.length && multiDragSortable === sortable) {
            multiDragElements.forEach(function (multiDragElement, i) {
              data += (!i ? '' : ', ') + multiDragElement.textContent
            })
          } else {
            data = dragEl.textContent
          }

          dataTransfer.setData('Text', data)
        },
      }
    }

    MultiDrag.prototype = {
      multiDragKeyDown: false,
      isMultiDrag: false,
      delayStartGlobal: function delayStartGlobal(_ref) {
        var dragged = _ref.dragEl
        dragEl$1 = dragged
      },
      delayEnded: function delayEnded() {
        this.isMultiDrag = ~multiDragElements.indexOf(dragEl$1)
      },
      setupClone: function setupClone(_ref2) {
        var sortable = _ref2.sortable,
          cancel = _ref2.cancel
        if (!this.isMultiDrag) return

        for (var i = 0; i < multiDragElements.length; i++) {
          multiDragClones.push(clone(multiDragElements[i]))
          multiDragClones[i].sortableIndex = multiDragElements[i].sortableIndex
          multiDragClones[i].draggable = false
          multiDragClones[i].style['will-change'] = ''
          toggleClass(multiDragClones[i], this.options.selectedClass, false)
          multiDragElements[i] === dragEl$1 &&
            toggleClass(multiDragClones[i], this.options.chosenClass, false)
        }

        sortable._hideClone()

        cancel()
      },
      clone: function clone(_ref3) {
        var sortable = _ref3.sortable,
          rootEl = _ref3.rootEl,
          dispatchSortableEvent = _ref3.dispatchSortableEvent,
          cancel = _ref3.cancel
        if (!this.isMultiDrag) return

        if (!this.options.removeCloneOnHide) {
          if (multiDragElements.length && multiDragSortable === sortable) {
            insertMultiDragClones(true, rootEl)
            dispatchSortableEvent('clone')
            cancel()
          }
        }
      },
      showClone: function showClone(_ref4) {
        var cloneNowShown = _ref4.cloneNowShown,
          rootEl = _ref4.rootEl,
          cancel = _ref4.cancel
        if (!this.isMultiDrag) return
        insertMultiDragClones(false, rootEl)
        multiDragClones.forEach(function (clone) {
          css(clone, 'display', '')
        })
        cloneNowShown()
        clonesHidden = false
        cancel()
      },
      hideClone: function hideClone(_ref5) {
        var _this = this

        var sortable = _ref5.sortable,
          cloneNowHidden = _ref5.cloneNowHidden,
          cancel = _ref5.cancel
        if (!this.isMultiDrag) return
        multiDragClones.forEach(function (clone) {
          css(clone, 'display', 'none')

          if (_this.options.removeCloneOnHide && clone.parentNode) {
            clone.parentNode.removeChild(clone)
          }
        })
        cloneNowHidden()
        clonesHidden = true
        cancel()
      },
      dragStartGlobal: function dragStartGlobal(_ref6) {
        var sortable = _ref6.sortable

        if (!this.isMultiDrag && multiDragSortable) {
          multiDragSortable.multiDrag._deselectMultiDrag()
        }

        multiDragElements.forEach(function (multiDragElement) {
          multiDragElement.sortableIndex = index(multiDragElement)
        }) // Sort multi-drag elements

        multiDragElements = multiDragElements.sort(function (a, b) {
          return a.sortableIndex - b.sortableIndex
        })
        dragStarted = true
      },
      dragStarted: function dragStarted(_ref7) {
        var _this2 = this

        var sortable = _ref7.sortable
        if (!this.isMultiDrag) return

        if (this.options.sort) {
          // Capture rects,
          // hide multi drag elements (by positioning them absolute),
          // set multi drag elements rects to dragRect,
          // show multi drag elements,
          // animate to rects,
          // unset rects & remove from DOM
          sortable.captureAnimationState()

          if (this.options.animation) {
            multiDragElements.forEach(function (multiDragElement) {
              if (multiDragElement === dragEl$1) return
              css(multiDragElement, 'position', 'absolute')
            })
            var dragRect = getRect(dragEl$1, false, true, true)
            multiDragElements.forEach(function (multiDragElement) {
              if (multiDragElement === dragEl$1) return
              setRect(multiDragElement, dragRect)
            })
            folding = true
            initialFolding = true
          }
        }

        sortable.animateAll(function () {
          folding = false
          initialFolding = false

          if (_this2.options.animation) {
            multiDragElements.forEach(function (multiDragElement) {
              unsetRect(multiDragElement)
            })
          } // Remove all auxiliary multidrag items from el, if sorting enabled

          if (_this2.options.sort) {
            removeMultiDragElements()
          }
        })
      },
      dragOver: function dragOver(_ref8) {
        var target = _ref8.target,
          completed = _ref8.completed,
          cancel = _ref8.cancel

        if (folding && ~multiDragElements.indexOf(target)) {
          completed(false)
          cancel()
        }
      },
      revert: function revert(_ref9) {
        var fromSortable = _ref9.fromSortable,
          rootEl = _ref9.rootEl,
          sortable = _ref9.sortable,
          dragRect = _ref9.dragRect

        if (multiDragElements.length > 1) {
          // Setup unfold animation
          multiDragElements.forEach(function (multiDragElement) {
            sortable.addAnimationState({
              target: multiDragElement,
              rect: folding ? getRect(multiDragElement) : dragRect,
            })
            unsetRect(multiDragElement)
            multiDragElement.fromRect = dragRect
            fromSortable.removeAnimationState(multiDragElement)
          })
          folding = false
          insertMultiDragElements(!this.options.removeCloneOnHide, rootEl)
        }
      },
      dragOverCompleted: function dragOverCompleted(_ref10) {
        var sortable = _ref10.sortable,
          isOwner = _ref10.isOwner,
          insertion = _ref10.insertion,
          activeSortable = _ref10.activeSortable,
          parentEl = _ref10.parentEl,
          putSortable = _ref10.putSortable
        var options = this.options

        if (insertion) {
          // Clones must be hidden before folding animation to capture dragRectAbsolute properly
          if (isOwner) {
            activeSortable._hideClone()
          }

          initialFolding = false // If leaving sort:false root, or already folding - Fold to new location

          if (
            options.animation &&
            multiDragElements.length > 1 &&
            (folding ||
              (!isOwner && !activeSortable.options.sort && !putSortable))
          ) {
            // Fold: Set all multi drag elements's rects to dragEl's rect when multi-drag elements are invisible
            var dragRectAbsolute = getRect(dragEl$1, false, true, true)
            multiDragElements.forEach(function (multiDragElement) {
              if (multiDragElement === dragEl$1) return
              setRect(multiDragElement, dragRectAbsolute) // Move element(s) to end of parentEl so that it does not interfere with multi-drag clones insertion if they are inserted
              // while folding, and so that we can capture them again because old sortable will no longer be fromSortable

              parentEl.appendChild(multiDragElement)
            })
            folding = true
          } // Clones must be shown (and check to remove multi drags) after folding when interfering multiDragElements are moved out

          if (!isOwner) {
            // Only remove if not folding (folding will remove them anyways)
            if (!folding) {
              removeMultiDragElements()
            }

            if (multiDragElements.length > 1) {
              var clonesHiddenBefore = clonesHidden

              activeSortable._showClone(sortable) // Unfold animation for clones if showing from hidden

              if (
                activeSortable.options.animation &&
                !clonesHidden &&
                clonesHiddenBefore
              ) {
                multiDragClones.forEach(function (clone) {
                  activeSortable.addAnimationState({
                    target: clone,
                    rect: clonesFromRect,
                  })
                  clone.fromRect = clonesFromRect
                  clone.thisAnimationDuration = null
                })
              }
            } else {
              activeSortable._showClone(sortable)
            }
          }
        }
      },
      dragOverAnimationCapture: function dragOverAnimationCapture(_ref11) {
        var dragRect = _ref11.dragRect,
          isOwner = _ref11.isOwner,
          activeSortable = _ref11.activeSortable
        multiDragElements.forEach(function (multiDragElement) {
          multiDragElement.thisAnimationDuration = null
        })

        if (
          activeSortable.options.animation &&
          !isOwner &&
          activeSortable.multiDrag.isMultiDrag
        ) {
          clonesFromRect = _extends({}, dragRect)
          var dragMatrix = matrix(dragEl$1, true)
          clonesFromRect.top -= dragMatrix.f
          clonesFromRect.left -= dragMatrix.e
        }
      },
      dragOverAnimationComplete: function dragOverAnimationComplete() {
        if (folding) {
          folding = false
          removeMultiDragElements()
        }
      },
      drop: function drop(_ref12) {
        var evt = _ref12.originalEvent,
          rootEl = _ref12.rootEl,
          parentEl = _ref12.parentEl,
          sortable = _ref12.sortable,
          dispatchSortableEvent = _ref12.dispatchSortableEvent,
          oldIndex = _ref12.oldIndex,
          putSortable = _ref12.putSortable
        var toSortable = putSortable || this.sortable
        if (!evt) return
        var options = this.options,
          children = parentEl.children // Multi-drag selection

        if (!dragStarted) {
          if (options.multiDragKey && !this.multiDragKeyDown) {
            this._deselectMultiDrag()
          }

          toggleClass(
            dragEl$1,
            options.selectedClass,
            !~multiDragElements.indexOf(dragEl$1)
          )

          if (!~multiDragElements.indexOf(dragEl$1)) {
            multiDragElements.push(dragEl$1)
            dispatchEvent({
              sortable: sortable,
              rootEl: rootEl,
              name: 'select',
              targetEl: dragEl$1,
              originalEvt: evt,
            }) // Modifier activated, select from last to dragEl

            if (
              evt.shiftKey &&
              lastMultiDragSelect &&
              sortable.el.contains(lastMultiDragSelect)
            ) {
              var lastIndex = index(lastMultiDragSelect),
                currentIndex = index(dragEl$1)

              if (~lastIndex && ~currentIndex && lastIndex !== currentIndex) {
                // Must include lastMultiDragSelect (select it), in case modified selection from no selection
                // (but previous selection existed)
                var n, i

                if (currentIndex > lastIndex) {
                  i = lastIndex
                  n = currentIndex
                } else {
                  i = currentIndex
                  n = lastIndex + 1
                }

                for (; i < n; i++) {
                  if (~multiDragElements.indexOf(children[i])) continue
                  toggleClass(children[i], options.selectedClass, true)
                  multiDragElements.push(children[i])
                  dispatchEvent({
                    sortable: sortable,
                    rootEl: rootEl,
                    name: 'select',
                    targetEl: children[i],
                    originalEvt: evt,
                  })
                }
              }
            } else {
              lastMultiDragSelect = dragEl$1
            }

            multiDragSortable = toSortable
          } else {
            multiDragElements.splice(multiDragElements.indexOf(dragEl$1), 1)
            lastMultiDragSelect = null
            dispatchEvent({
              sortable: sortable,
              rootEl: rootEl,
              name: 'deselect',
              targetEl: dragEl$1,
              originalEvt: evt,
            })
          }
        } // Multi-drag drop

        if (dragStarted && this.isMultiDrag) {
          // Do not "unfold" after around dragEl if reverted
          if (
            (parentEl[expando].options.sort || parentEl !== rootEl) &&
            multiDragElements.length > 1
          ) {
            var dragRect = getRect(dragEl$1),
              multiDragIndex = index(
                dragEl$1,
                ':not(.' + this.options.selectedClass + ')'
              )
            if (!initialFolding && options.animation)
              dragEl$1.thisAnimationDuration = null
            toSortable.captureAnimationState()

            if (!initialFolding) {
              if (options.animation) {
                dragEl$1.fromRect = dragRect
                multiDragElements.forEach(function (multiDragElement) {
                  multiDragElement.thisAnimationDuration = null

                  if (multiDragElement !== dragEl$1) {
                    var rect = folding ? getRect(multiDragElement) : dragRect
                    multiDragElement.fromRect = rect // Prepare unfold animation

                    toSortable.addAnimationState({
                      target: multiDragElement,
                      rect: rect,
                    })
                  }
                })
              } // Multi drag elements are not necessarily removed from the DOM on drop, so to reinsert
              // properly they must all be removed

              removeMultiDragElements()
              multiDragElements.forEach(function (multiDragElement) {
                if (children[multiDragIndex]) {
                  parentEl.insertBefore(
                    multiDragElement,
                    children[multiDragIndex]
                  )
                } else {
                  parentEl.appendChild(multiDragElement)
                }

                multiDragIndex++
              }) // If initial folding is done, the elements may have changed position because they are now
              // unfolding around dragEl, even though dragEl may not have his index changed, so update event
              // must be fired here as Sortable will not.

              if (oldIndex === index(dragEl$1)) {
                var update = false
                multiDragElements.forEach(function (multiDragElement) {
                  if (
                    multiDragElement.sortableIndex !== index(multiDragElement)
                  ) {
                    update = true
                    return
                  }
                })

                if (update) {
                  dispatchSortableEvent('update')
                }
              }
            } // Must be done after capturing individual rects (scroll bar)

            multiDragElements.forEach(function (multiDragElement) {
              unsetRect(multiDragElement)
            })
            toSortable.animateAll()
          }

          multiDragSortable = toSortable
        } // Remove clones if necessary

        if (
          rootEl === parentEl ||
          (putSortable && putSortable.lastPutMode !== 'clone')
        ) {
          multiDragClones.forEach(function (clone) {
            clone.parentNode && clone.parentNode.removeChild(clone)
          })
        }
      },
      nullingGlobal: function nullingGlobal() {
        this.isMultiDrag = dragStarted = false
        multiDragClones.length = 0
      },
      destroyGlobal: function destroyGlobal() {
        this._deselectMultiDrag()

        off(document, 'pointerup', this._deselectMultiDrag)
        off(document, 'mouseup', this._deselectMultiDrag)
        off(document, 'touchend', this._deselectMultiDrag)
        off(document, 'keydown', this._checkKeyDown)
        off(document, 'keyup', this._checkKeyUp)
      },
      _deselectMultiDrag: function _deselectMultiDrag(evt) {
        if (typeof dragStarted !== 'undefined' && dragStarted) return // Only deselect if selection is in this sortable

        if (multiDragSortable !== this.sortable) return // Only deselect if target is not item in this sortable

        if (
          evt &&
          closest(evt.target, this.options.draggable, this.sortable.el, false)
        )
          return // Only deselect if left click

        if (evt && evt.button !== 0) return

        while (multiDragElements.length) {
          var el = multiDragElements[0]
          toggleClass(el, this.options.selectedClass, false)
          multiDragElements.shift()
          dispatchEvent({
            sortable: this.sortable,
            rootEl: this.sortable.el,
            name: 'deselect',
            targetEl: el,
            originalEvt: evt,
          })
        }
      },
      _checkKeyDown: function _checkKeyDown(evt) {
        if (evt.key === this.options.multiDragKey) {
          this.multiDragKeyDown = true
        }
      },
      _checkKeyUp: function _checkKeyUp(evt) {
        if (evt.key === this.options.multiDragKey) {
          this.multiDragKeyDown = false
        }
      },
    }
    return _extends(MultiDrag, {
      // Static methods & properties
      pluginName: 'multiDrag',
      utils: {
        /**
         * Selects the provided multi-drag item
         * @param  {HTMLElement} el    The element to be selected
         */
        select: function select(el) {
          var sortable = el.parentNode[expando]
          if (
            !sortable ||
            !sortable.options.multiDrag ||
            ~multiDragElements.indexOf(el)
          )
            return

          if (multiDragSortable && multiDragSortable !== sortable) {
            multiDragSortable.multiDrag._deselectMultiDrag()

            multiDragSortable = sortable
          }

          toggleClass(el, sortable.options.selectedClass, true)
          multiDragElements.push(el)
        },

        /**
         * Deselects the provided multi-drag item
         * @param  {HTMLElement} el    The element to be deselected
         */
        deselect: function deselect(el) {
          var sortable = el.parentNode[expando],
            index = multiDragElements.indexOf(el)
          if (!sortable || !sortable.options.multiDrag || !~index) return
          toggleClass(el, sortable.options.selectedClass, false)
          multiDragElements.splice(index, 1)
        },
      },
      eventProperties: function eventProperties() {
        var _this3 = this

        var oldIndicies = [],
          newIndicies = []
        multiDragElements.forEach(function (multiDragElement) {
          oldIndicies.push({
            multiDragElement: multiDragElement,
            index: multiDragElement.sortableIndex,
          }) // multiDragElements will already be sorted if folding

          var newIndex

          if (folding && multiDragElement !== dragEl$1) {
            newIndex = -1
          } else if (folding) {
            newIndex = index(
              multiDragElement,
              ':not(.' + _this3.options.selectedClass + ')'
            )
          } else {
            newIndex = index(multiDragElement)
          }

          newIndicies.push({
            multiDragElement: multiDragElement,
            index: newIndex,
          })
        })
        return {
          items: _toConsumableArray(multiDragElements),
          clones: [].concat(multiDragClones),
          oldIndicies: oldIndicies,
          newIndicies: newIndicies,
        }
      },
      optionListeners: {
        multiDragKey: function multiDragKey(key) {
          key = key.toLowerCase()

          if (key === 'ctrl') {
            key = 'Control'
          } else if (key.length > 1) {
            key = key.charAt(0).toUpperCase() + key.substr(1)
          }

          return key
        },
      },
    })
  }

  function insertMultiDragElements(clonesInserted, rootEl) {
    multiDragElements.forEach(function (multiDragElement, i) {
      var target =
        rootEl.children[
          multiDragElement.sortableIndex + (clonesInserted ? Number(i) : 0)
        ]

      if (target) {
        rootEl.insertBefore(multiDragElement, target)
      } else {
        rootEl.appendChild(multiDragElement)
      }
    })
  }
  /**
   * Insert multi-drag clones
   * @param  {[Boolean]} elementsInserted  Whether the multi-drag elements are inserted
   * @param  {HTMLElement} rootEl
   */

  function insertMultiDragClones(elementsInserted, rootEl) {
    multiDragClones.forEach(function (clone, i) {
      var target =
        rootEl.children[
          clone.sortableIndex + (elementsInserted ? Number(i) : 0)
        ]

      if (target) {
        rootEl.insertBefore(clone, target)
      } else {
        rootEl.appendChild(clone)
      }
    })
  }

  function removeMultiDragElements() {
    multiDragElements.forEach(function (multiDragElement) {
      if (multiDragElement === dragEl$1) return
      multiDragElement.parentNode &&
        multiDragElement.parentNode.removeChild(multiDragElement)
    })
  }

  Sortable.mount(new AutoScrollPlugin())
  Sortable.mount(Remove, Revert)

  Sortable.mount(new SwapPlugin())
  Sortable.mount(new MultiDragPlugin())

  return Sortable
})
